Here's what I want to do. I have a Marshall JVM combo amp (with MIDI connections in back). I want to buy the Eventide Modfactor and an expression pedal. Is there a way to connect the two via MIDI and a MIDI switcher so that I can switch a channel on the amp and simultaneously switch to a preset on the Modfactor? What would I need to do this? Any certain MIDI switcher? Also, what is the best expression pedal? I've seen everyone using the M-Audio one, but it gets crap reviews on mf (where the reviews are usually all inflated). Thanks.