ORIGINAL: TedMo
As Ryan asked what is wrong with the Spectrum servos/ i believe they are digital so what more could you want?
SPEED!!!
I put the Airtronics 94772's in the ailerons. If you want to upgrade the ailerons and the elevators, specifically for the Venus II, they are amazing and around $70 right now. Very fast at .09s on 6V, and about 90oz of torque which is plenty for the surfaces on that plane.
[link=http://www.hobbypeople.net/gallery/474372.asp]Airtronics 94772[/link]
I never got around to doing the elevators on that plane before I sold it, but it would have been a major improvement. I had the plane loaded with JR DS821 to start.