I own both the PSR2000 and the Tyros and the 2000 remains in the closet. In addition to all the pro Tyros comments given by the others, its substantially improved keyboard feel alone make it much 'more satisfying' for me to play.
btw: The 'street price' difference between the Tyros & PSR2100 is actually $1000-1200, not 2 grand ($2000) as rick987 had suggested. I think the PSR2100 a terrific bang for the buck, but (for me) that the additional feature enhancements the Tyros offers make it well worth the extra expense. The only drawback to the Tyros vs PSR2100 is that it doesn't include built in speakers, but the Tyros 'add on' (TRSMS01) speakers sound significantly better than the one's on the PSR2100, and are imho not an inconvenience to take separately or attach (a matter of 10 seconds). Here are some Tyros features not included on the PSR2100 which make a difference to me:
1) Hard drive support
2) Significantly improved 'keyboard action' build quality with much improved (responsive) action.
3) LARGE 'color' tilt LCD screen with much larger font size for much easier reading & improved navigation ease.
4) LARGER physical 'navigation' buttons. Primary arranger buttons are also lighted and change color making for easier confirmation of current status.
5) Dedicated 'intro' (3 each) buttons
6) Dedicated 'ending' (3 each) buttons
7) Separate dedicated mic volume & mic trim buttons located conveniently on top of keyboard for easy on the fly adjustment
8) 3 assignable foot controllers vs 2 on the 2000
9) USB support to provide easy internal Tyros 'file organization' & convenient data backup to PC/CD/DVD. Though the Tyros includes a floppy disk slot, I never need to use it because it's much more convenient (and quicker) to transfer data back & forth between my PC & Tyros via USB.
10) ability to easily edit & customize Tyros voices (sounds) remotely from your desktop PC via "Yamaha Voice Editor" Windows software. The PSR2000 doesn't include this.
Scott
------------------
http://scottyee.com