Red Max,
I friend has used JR 125 MG analog servos on his Funtana 90 for many years and never had a problem. He fly's it pretty hard too.
I also have had some for quite a while and are now on my 3D 60 size profile plane (Mojo 60). They aren't super fast but that would make them perfect for your application.

With metal gears you won't have to worry about stripped gears plus they provide 125 oz of torque at 4.8 volts. They only cost $32 plus they draw much less juice than of my big digitals use so you won't require a big capacity Rx battery.

I would buy them again. I hope this helps.

http://www.servodatabase.com/servo/jr/st125mg


Phillip