A few weeks ago, I got a Boss GT-3 multi-effects pedal:
It came out in like, '98 and I bought it for about $160. It has 35 customizable banks and 50 pre-made banks.
It has 4 channels in each bank, with "CTL" button, which adds other effects to the effect you are on. It has a built in expression pedal and has a line out for and external expression pedal.