VTX 200 preamp section is to my knowledge similar as  in Ampegs. Crate shockvawe? GX 140 C? Similar?? Whatever the case they sound excellent dialed right and with some additional gear.

Nice to see Lab-Gruppens Axe mentioned. No wonder Johnny Winter liked it, its a gerat sounding amp.
BB,Allan Holdsworth, David Chastain and Ty Tabor are some famous users who have praised their Lab series amps but i seem to remember that Albert King used Acoustic 260 and 261 amps as did Chuck Berry at some stage of his career.
And as many times before has been mentioned :Other famous Acoustic users were Frank Marino, Ernie Isley, Pat Metheny, Frank Zappa and Robbie Krieger.List goes on......

And as for ZZ Top I believe they have used about everything under the sun at some stage, they most certainly used Rockman stuff........ :loco

As a personal recomendation: Everybody interested in current state of solid state amps should try Crate VTX 200 S  and Rocktron V50D  and  If possible the Pritchard Amp of their choice or Blue Tone.
All and all i think many people would be surprised if they would know what kind of gear has been used in many of their favourite records to achieve some of their favourite guitar sounds (that they believe were produced by using some fancy tube amps).  :tu:

Exellent post ylo! This kind of info and opinions of  certain brand of amplifiers is most interesting.

Misery Index :Ampeg VH 140C (+ Peavey 5150)
Death: VH 140 C ?( this needs confirmation!!!!!!)(after the second album chuck used marshall valvestate 8100)According to Wiki used GK on tour.Had ADA MP-1.Used Randalls..Boss DS-1.So...........? :loco
Suffocation: Souls to Deny,despise the sun (Ampeg VH 140 C)
Odious Mortem:Ampeg VH 140 C
Mortal Decay:Forensic,Sickenin Erotic Fanaticism,Gatherin of Human Artifacts (Ampeg VH 140 C,Ampeg SS 150 )
Animosity: Ampeg VH 140 C
Rigor Mortis/Ministry(Mike Scaccia):CRATE VTX 350 H

How to target your perfect customer:
I often ask from myself why some manufacturers are trying to sell and design SS amps evenly to all styles and level of players (Jack of all trades, master of none) instead of targeting to a better end result by focusing their efforts to a more specific customer group and a design to suit that groups demands(excluding obvious beginners market:-cheaply made practise amps xP).Certain type of players with specific style, attitude and opinions wouldn't touch a solid state amp with a stick.So..who is going to buy the amp? a beginner or a semipro or Professional player.Boutique SS amps are used by professionals, they can afford them.Do country or Jazz player need a high gain distortion? What are the design parameters?

It is obvious that the main (!!!)target users are Jazz, Extreme Metal and Country players.Among those are the volume users.Some potential in acoustic amps , even amps intented to STICK players (even more specific group/less customers) and alike. 
Jazz amps like : JazzCat, Polytone, Henrikson,AER, AI,Evans etc. are targeted to that customer group and designed to meet their demands. Same with metal amps(Randall,Madison,B 52 etc..) and Peavey Nashville is THE Steel guitar amp; just check Steel Guitar Forum. The amp must have a certain image to identify it with the customer.
You need some name players(!!) to use your amp to make it marketable, many examples of this in the real world, if Pro's arent using it, its not a PRO level amp.
In design stages it would be good to have feedback from pro players, if they dont like it nobody else will.What are the features they dont like? Could those be improved?Check Pritchard interviews (Al Dimeola and Santana comments).
It takes about a minute to form an opinion of the amp when trying it out. If it makes an impression; OK.... if not ; no sale.
And it wouldnt hurt to A/B test it with the competition including popular tube amps.

Tough competion; Pritchard and Blue Tone(Boutique amps)and Peavey transtube, Crate(VTX series, GT 3500), all those jazz amps,.....
if you dont offer something better(!) or different and innovative that is allready there, and remember they have a NAME (and reputation) and experience behind them,you are fighting a losing battle.
On the other hand; if you really have something unique; wellcome! make it happen !!

Any info which models use the zener diode configuration and which models use the "actively controlled "rubber diode" configuration.

Teemuk! Do you have CRATE schematics? :loco

In need of Crate schematic. Any amp with Flexwave (preferably Flexwave 5) circuitry.GTX VTX or equivalent. GT 3500 schematic would be nice.
Has anybody got any information about how the Flexwave circuits have evolved through different versions.Timeline of changes would be usefull.
Any mod suggestions? Shoddy workmanship,low quality parts,not enough solder in printed circuit traces, what else could be improved? :loco

Teemu K. Many thanx for your informative reply. You truly are a master in your field.If you happened to find any additional info on that "valve dynamic circuitry" it would be much appreciated. Really like that sound of RG 150/300 G3 and V2/T2 power section for metal purposes.
Thanx for clearing up my impression of those vox amps. I check the schematics. Personally, not my cup of tea, those vox amps, though.

Randall has something called Valve Dynamic in their G3 series amps (possibly designed by Bruce Egnater).12 AT7 driver(?) tube before MOSFET power section.What is the verdict? is it just a fancy pilot light(ala behringer tube pre-amp), or does it serve a purpose?Does anyone know the operating voltage and the real!! function of that tube? Teemu K, is this valve dynamic in the vain of vox design ,which according to your investigations,i believe, was a "scam". With right speakers the amps sound great(they are intented to be used in metal music)but am i blinded by marketing departments "fairy dust" or fake glow of a makebelieve tube?

What about that book you wrote. Is  it allready available somewhere? Pdf file?...to be found where?Lookin forward to that.
Is it possible that you would share some thoughts about Pritchards designs (i Know that they are beyond the scope of DIY Forum-if this is such) but the Amps sound great and the circuitry is interesting so ...please share some of that expertise.Any insight of that 12AX7 pre-amp tube emulator with two IC's.

 :oYes!
This sounds interesting! Please keep us informed how its turning out. Any ideas how to improve the pre-amp section on these amps. I think there is room for improvement  in the distortion section as the case usually is in solid state fenders. I have done some thinking but no practical solution yet.