I, like llyren, own an XP-80, and though I agree with his assessment of the keyboard, I don't think it will suit you. The XP arpeggiator is only single as well, meaning only one instrument at a time, not a whole band being run on multi-arpeggiators. The XP is more of a create-it-yourself kind of board. As close as it could come to your style of arpeggiator is in patterns. You can trigger paterns with keys. A patern is basically a short sequence that gets looped. So, you could put a drum loop on one patern, a bass line on one, a string line, etc, then trigger these paterns using separate keys on the XP. However, you still have to create the patterns, and they won't change chords, unless you create a pattern for each chord you want.