I had a RP-350, RP-355, and RP-500 hoping one of them would give me the tone I wanted. They are just too much to tweak between cabinets, amps, effects, etc... I tried a boss ME-25, almost pulled the trigger on one of those, but I am back to finding pedals. I've seen a lot of great videos on the M9, but I'll be waiting for a used one before I decide. I do use a Line 6 pocket pod, but that is for recording and quiet pratice. (Not that I haven't been tweaking it all the time though)