My favorite is the EQD Dispatch Master, because I like the "airy" reverb tone and appreciate that the pedal does double duty as a delay. I also enjoyed the Nimbus, but it has more of a "cavern" or "underground" type of reverb tone to my ear, whereas a slightly prefer a tone more in the vein of the EQD.
I will however note that I tend to use reverb more as a sound effect, often layered with other effects (chorus, delay, reverb), to spice up upper register chords, arpeggios, and solos. I rarely use it on bass lines and rarely use subtle settings.