In a humanoid, torque is a lot more important than speed. Very few joints need to move faster than 0.2 seconds for 60 degrees, which is not a "fast" servo, but all the leg joints will need a lot of torque to keep the body upright.
For $1100, I'd still recommend the Bioloid, or perhaps the Hovis (a similar robot from competitor Dongbu Robot.)
If you want to do a humanoid with hobby servos, try a Pololu Maestro as your controller, and the Hitec servo brackets from lynxmotion. It's probably still going to be taller than 8", though.
The 5710K looks like another option, although I have no experience with the wCK servos/actuators, so I couldn't say whether this is a good deal or not.