I've been using these for years in 40 size sport planes and recommend without hesitation. Good value for the products and support.
Standard analog:
HS-425BB Deluxe Ball Bearing Standard Servo
Part No:
31425S
High speed analog metal gear:
HS-625MG High Speed, Metal Gear Premium Sport Servo
Part No: 32625S
Here's a link to the Hitec servo's:
http://hitecrcd.com/products/servos
Good luck!
-PD