Interesting- I just spent a good amount of time this week with my friends 910 and my Tyros 2 side by side.

You would be well served with either keyboards. I happen to like the feel of the T2 much better. The keys, the buttons, the layout...

I think both sound good- the Tyros 2 does not sound any better.

It's a hard call- especially since you can get a warnity with a new 910...

good luck- let us know which one you get.