You may want to have a look at the Roland G70. It has good sounds, workable styles and a lot of other useful features. But most important if you are a keyboard player, it has great 76 keys that would make you want to play.
The good thing about the G70 is that Roland is always listening to the users and constantly up dating the OS.


Another board that is equally good is the Korg Pa1x pro. It has 76 keys and greate arranger synth and sampling features. There is also hard drive, mp3 and CDs possibilities with the Pa1x pro. Korg also listens to their users and is regularly up dating the OS.

Both the Korg and the Roland can function resonably well as a "workstation". I think with one of them you would be very happy.