For Futaba I'd get 9252's. They seem to have the best following and are recommended all the time for helis.

I would certianly get digitals if you want better performance. They center better and have higher holding power.

Get servos with at least 50 oz in of torque and you should be fine, but the 9252's will be perfect.

A standard servo will be okay for the throttle unless you are gonna run a governor.

You might also want to consider a higher capacity battery if you go digital. I run JR digital servos and get only 2 flights on an 1100mah nicd pack before I have to recharge it. That's the only downside to digitals other than price is that they draw more power.