I have been using Futaba 9451 Digital servos and loved them. I have been switching to the Bluebird Servo's as I need new servo's. I currently race with 3 of them and know two other people who use them. We have never had a problem and they seem every bit as good as the high dollar servos. Here is a link to a full line of them plus only .95 S&H.
http://www.slickzero.com/Merchant2/m...gory_Code=Elec