Hey Doug!
I agree with some of the things you've said, but he SP-555's actually pretty cool in some respects. I saw the new SP-555 videos on Roland US and (even though I have an MV-8800, as you know), I'd still think about getting one as a live unit, as the MV is pretty large and heavy and the smaller footprint of the SP looks good for taking to a gig, especially those in small venues (and where you don't want to take something as expensive as the MV). It also has quite a cool Ableton Live like feature for capturing live loops on the fly.
If you actually were about to buy the MPD, take care. I had an MPD-24 back in December and although good, the pads a very shallow (no way as deep as the MPC's or MV's) and don't feel that great at all (kinda hard).
SekondThought
"Computers are cool, but hardware rules".
SekondThought
"Computers are cool, but hardware rules".