.c Another vote for the Roland JC's. There are bunch of them in various configurations, JC 50, 77, 90, 120, 160, and a head version of the 120, not sure if there are any other head only.
Im very particular about reverbs, as I think most Dead related guitar players are, more-so than other types of players. I tried a Peavey Valveverb rack, the reverb wasnt too good. Tried an old Sansui hi-fi unit with a phono level adapter, as cool as it looked, it just didnt work out well for guitar. Dont know how many pedals I have tried, although I will admit, never tried any of the "best" models like T Rex or Strymon. Ive had some Lexicons, some better than others and the same results with the original Fender units & reissues. I have had the best overall luck with the old Furman rack reverbs & there are some old DOD's that are pretty good. The Furman has a limiter on it. They tend to be noisey but after Ive sent them off to be worked on always came back nice & quiet. I sent them to CJLectronics.com, that is who analogman recommended. And he does great work on mutrons & anything else Ive sent him.
If you can find a Furman, Id say grab it, especially if its priced good.
Hope this helps,