While I've not used this brand of servo, they got some pretty good reviews on one of the heli websites. The price is sure right and they are fast and strong. Kryptonite gears and the output is unthreaded if you want to tap for a M3 screw.

[link]http://www.audacitymodels.com/products/category.aspx?ID=2a214a63-1e28-4604-8c80-f06b7e38cdea[/link]