Right now, awaiting Genesys, 7000 and Tyros, this is my opinion:
PSR 9000 (PRO), has the best styles if you want modern rock, country, ballads and blues. If you play a lot of latin and middle Europian styles etc, Ketron SD1 is the winner. Technic's styles I find too pompous and soft, makes an excellent table (taffel) music machine. Roland has a ways to go for most styles, somewhat unfinished for my ears. Korg and GEM, I don't know.
Allright, I'm flat on the deck looking for cover....

Roy-Andrè
Yamaha fav