My new servo. Futaba S9550 low profile :)

Check out the spec:
Volts Torque Speed
4.8V 66.6 oz-in. 0.14 sec/60°
6.0V 83.3 oz-in. 0.11 sec/60°
Dimensions Weight
1.6 x 0.8 x 1.0 in. 1.6 oz.
It was about $90 dollars though. :( But I'm sure will be worth the money!
Here is a link to Futaba explaing why digital servos are better. It also has ball bearings which will make a lot more difference. I paid for my m8 fm control today too, so I hope it'll be here by the weekend. :)

Here is the old one for comparison.

Volts Torque Speed
4.8V 42 oz-in. 0.2 sec/60°
6.0V 53 oz-in. 0.16 sec/60°
Dimensions Weight
1.54 x 0.79 x 1.42 1.6 oz.