I've figured out my rig as a guitarist. It would go Wah -> Whammy -> Line 6 MM4 -> Delay -> Volume pedal. I'd only use amp distortion and switch between clean and dirty channels using a footswitch (or I could use two amps, one clean, one dirty, and use an amp selector switch). The MM4 would be convenient because it would have the most effects I would need out of all the Line 6 stompbox modellers. I'd use flanger, Leslie simulator, tremolo, and some other stuff... However, I haven't decided whether to use any of the Line 6 Stompbox modellers on bass, because I'm not sure if it maintains the low end. In fact, the only modulation effect I'd really need would be a chorus pedal (my effects GAS list has decreased). If the Line 6 modellers maintain low end, great! I'll probably buy one for bass.