Airtronics
Airtronics servos are strong and fast, but people seem to be reluctant to run them. I would hang onto them, heck the newer ones may be great servos. There is only one way to find out. Slap one in your ride and run it. Otherwise just keep them as backups when you need a servo during a race if one of you servos dies. It never hurts to have one on hand just in case.