The cage on the shimano 10spd is ~0.6 mm (number from memory, don't quote me on it) more narrow than the 9spd cage. My guess is it will shift ok, but you'll get more rubbing and noise with cross-chain gear combinations when you combine it with the thicker 9spd chain.

I'd stick with the 9spd model to go with the 9spd drivetrain, if you can find it.

J

10 spd will work fine.

However the 7700 is way cheaper. Looks like Lickbike have the braze-on

http://www.lickbike.com/...RT_NUM_SUB='0375-00'