Hi there.
Answers to the various questions asked are:-
I feel Yamaha sounds and styles don't have enough presence/feeling to them, this is just my personal taste and for everyone who agrees with me someone would disagree, so I don't intend starting a what is best debate.
The Genesys has loads of piano sounds which are all very good. I've always considered my SD1 and G1000 to be best in my opinion for piano sounds but the piano's in the real sounds bank are superb and you can edit them even further to your hearts content.
I can save all the demos as MP3 files but they are quite large files. I do have ADSL so I'll send the guy who asked for some of them a few, so he can post them onto his site. I could also send some songs of myself playing after I've fathomed out how the CDRW works. I've been that busy programming my own setups and styles I haven't had time to record anything yet.