tracknet:
I plugged my headphones in both keyboards to try to compare the two (E-56 and PSR-2100). It's hard to compare, but my personal taste is that the Yamaha has a better piano voice. With other instruments the difference is bigger. I personally play a lot of organ sounds and here the difference i huge. I havn't converted any styles from the Roland keyboard and I probably won't since it has no disk drive. I'm not even sure it can be done (maybe to play the styles and record them on the computer and then edit them in some way).

Scott:
The USB-connection does not allow you to play styles that resides on the computer harddrive directly from the keyboard. The File Utility program that run on the computer is only for transfering styles, songs etc. to and from the USER-areas on the keyboard. Also there is no way to connect an internal or external harddrive that I'm aware of (no mentioning of this in the manual).

Regards,
/David