Having a few very natural sounding reverbs would be great. The difficult part is getting them to sound that way through a typical 4X12 cab, so some adjustable onboard EQing that only effects the reverb would be a nice touch and is pretty common.. As you normally have 10 types of effects per box, I'd suggest going with 9 reverbs and one delay with basic digital, bucket brigade and tape delay types. It shouldn't be too difficult as delay and reverb have alot of commonalities. It would make the pedal even more flexible.
