Yes , the reverb on tube amps is very good ( on most of them) .
LJN what it sounds like to me that you want is a Marshall with reverb , here's what you can do , what I have done.
Find a Peavey Triumph and do some simple tone mods ( you can do this with 4 very simple mods).
INSTANT JCM800 WITH REVERB plus a better clean channel lol