I use reverb, only for certain parts/sounds, in my bass rig pedalboard and I tried a bunch of pedals, perhaps this may help you out...
Boss RV-5 - to be honest it really didn't do much for me, just wasn't enough IMO.
Boss FRV-1 - sounded pretty great, but only one setting was usable for what I wanted.
Boss FDR-1 - pretty cool, a bit more "cavernous" than the FRV-1, but just as limited.
EHX Holy Grail - veeeery awesome reverb with variety, but it really killed the main/dry signal volume when it was on for bass.
EHX Holy Grail Plus - I got this cuz it has a Blend knob which would remedy the issue I had with the Holy Grail, BUT when I got it from Guitar Center for some reason it was making a significant buzz sound while next to any of my other pedals, something to do with the powersupply I believe. Might've been a damaged pedal, but I hate dealing with GC and didn't want to bother trying to get another one.
Digitech Digiverb - very awesome reverb pedal! Affordable too! Several great settings. The only reason I got rid of this was because the switch got fried somehow, I got a freelance gig to design/rehouse a pedal where my client compensated me with a BYOC reverb pedal kit. I was later able to fix the Digiverb, just had to replace a 35cent part, and gave it to a friend.
BYOC Reverb - I built my own reverb pedal from the kit, but I did several mods to the circuit board so I could fine tune and dial in the best dry/effect mix. Tons of reverb to mess with, from subtle to the deepest biggest caves. I painted it, designed the graphic and applied the graphic. Sounds awesome, looks awesome. probably my favorite pedal.
[Invalid or Expired Link Removed]
that Nimbus bass reverb seems pretty sweet too! I can tell from it's knobs that it has some functionality that other reverb pedals just don't have.