I have a line6 flextone III XL, 2x12" 150wts, midi in/out, left/right external speaker outs which is really awesome. Only drawback so far is I don't have the pedal to go with, so I limited to only saving 4 diff. settings. With the shortboard or FV4, you can boost that up to 32 stored setings, I believe, plus control volume and such. I played this thing for a couple of days, then went and bought it.