I use the Futaba 9550 and I'm now using the Hitec 5925. I like the new Hitec because of the .08 speed and the moster torque of over 130oz plus. Both servos run about 100 bucks but good digital servos with big speed and torque do.
Castle Creations (Since 2005)
Bumps & Jumps RC (One of the best racing facilities around)
ST Racing Concepts (STRC) Great aluminum upgrades for many brands.
Custom Works (Best Oval Cars around). Too many titles to list
Shout out to: Sticky Kicks, CR Graphics and Race Ready Products