I gave my SD1 to AJ today for the EXP upgrade. I got to hear a different one which was not finished yet. The sounds are really awesome! What really grabbed me though was the bends on the guitar picks when you hit a key with high velocity (listen to AJ's demos above). AJ tells me that the polyphony will be bumped up to about 78 notes too. AJ- stop making demos and get my keyboard done! (just kidding)
Bruce