I don't own one but have tried and was very impressed with the Source Audio Dimension Reverb. Lots of options and controls. I currently own three reverbs and can achieve everything I want with those three. Here's what I use:
Boss RV-3 Digital Reverb/Delay: has 4 different kinds of reverb with 100% wet mix if wanted. Also has a nice plate mode, all sound crisp and well digital. Can run delay and reverb.
Roland RE-20 Space Echo: has a Z-spring reverb, can sound VERY bouncy (can be envelope filter like). Warm and can also run delay and reverb.
MSLP delay/reverb/looper: uses a Belton Long brick, has controls for damp and size (can get VERY cave-like). Can run delay with mod, reverb and looper for a LOT of options.
If I'm feeling really spacey ill run all 3 and get lost in them....