What did you not like about the OAS 7 upgrade? Were there things in OAS 6 that weren't implemented in OAS 7? What features did you expect in OAS 7 that you felt weren't provided? Just curious since I have OAS 7 and it seems fine for what I am using the Wersi for.

At least with Wersi you'll see future software and hardware improvements that most other manufacturers can't or won't offer. When I had my Yamaha 9000 Pro there were no fixes for the numerous bugs and hardware issues it had. Yamaha dumped the 9000 Pro from their product line rather than offer customers future updates to make it right. Take that into serious consideration before buying a Tyros 3. If the Tyros 3 has bugs or hardware issues they may never get resolved and Yamaha may repeat what they did with the 9000 Pro i.e. now you see it, now you don't!