Graham: you might recall that Yamaha released a series of voice editors for the plug-in expansion cards that go with the 9000 Pro, some of which were stand-alone editors but most of which were for use with the discontinued XG Works sequencer program. None have been converted to OPT yet. Also Yamaha's XGEdit program is a stand-alone editor which has no current OPT counterpart yet (I expect this to happen very soon though). Since the Tyros OPT panels are actually for use with programs like Sonar, I assume that you can do voice editing over MIDI as easily as you can over USB. So the lack of a USB interface on a 9000 Pro alone is not the reason that Yamaha has not adapted it's existing expansion card voice editors for OPT, or not produced one at all for the main voices or the XG voices of the 9000 Pro. I believe it's more that the Tyros support and development has been fast-tracked in all areas over providing OPT support for the 9000 Pro and even over producing generic XG OPT voice editors. Obviously selling new keyboards is more profitable than supporting old ones. I only question this in light of the fact that the 9000 Pro is a current model and it really should have the same support and OPT features that the Tyros does if it's to be sold along side it for more money. Who wants to pay more for a keyboard that doesn't have the support of it's cheaper counterpart?