The current piano sound on the Tyros 2 s900 does not make it worth it for me to have 76 keys. Granted, there are other reasons for having 76 keys apart from the piano sound. But, if the piano sound is indeed improved on the T3, then yes I'd definitely buy the nex PSR-S keyboard that had 76 keys. I would not buy a Tyros because I use my arranger mostly for fun and like having the built-in speakers.