You might want to look for a second hand PSR-3000 which offers USB to device, and mega voices.
I'd stay clear of the PSR-2000...sounds are fine, but the disk drive is old technology now.
Ian
_________________________
Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.