The Korg multi-effects pedal I purchased (3000G) is AMAZING! I found this unit for $250 at The Guitar Center. Basically, any effect you can think of is included and if it's not in there, just use the external effect in/out to add an effect.

Lots of storage space for custom config's and the programming can be done with the convenient knobs and switched on stage with an impressive array of foot pedals. The Effects Step Senquencer (ESS) allows you to control the parameters you choose for each effect with the convenience of a pedal and in 8 graduated steps. Or the pedal can be used as volume or delay as in the typical case.

I want one for my base as well, but $200 is a lot for a secondary instrument.