I've been using KST servos on all my birds for a while now and I'm very pleased with them. Sure there not BK, MKS, or Torq but for the price, you can't go wrong. That's just my opinion. This is where I purchase my KST servos from Aloft Hobbies - Gliders, Gear & Service. .
KST are one of the top of the line brands. You won`t have any trouble with them. My sister has been a KST team pilot for several years, and I have never seen any of her servos fail.