Scott:
It's good to see Yamaha's sequencers improving, but they have a long ways to go to catch up to the resolution of computer-based sequencers. For example, Steinburg's Cubase V.5 supports up to 15,380 ppq resolution. Whatever Tyros does, I'd bet good money it won't do that. All of your other points are quite valid (where did you came up with the PPQ resolution for the 9000 Pro's sequencer?). Since even the least expensive computer sequencers offer more than you can pack into any keyboard, the keyboard's internal sequencer is the least important thing to me... it's the polyphony that's my greatest concern because that determines how many keyboards and/or modules I will need to perform my music live. My 9000 Pro currently has the polyphony of more than three PSR2000's. I noticed that the Tyros' polyphony or it's ability (or inability) to take expansion boards hasn't been mentioned yet.
Esh
http://www.mp3.com/esh