I have had very good results with Hyperion Atlas HP-DH20-UTD servos. They are programmable, titanium gear, high voltage, aluminum case, 291-333oz, dual ball bearing servos. I use 8 of them in my 35% Extra 330 and they are simply the most bang for the buck, in my opinion.
In opposing dual servo applications like the rudder, I will say the dead band is a little tight (even after programming) and they will fight each other a little hunting for neutral, but that is really the only complaint I have on them to date. These operate and feel much like a 7954SH Hitec, although they do seem to absorb a little more battery per flight than the Hitecs.
I have 10 of them ready to install in my 40% Sukhoi project and I have no reservations about using them in any big aircraft. We sell these for $46.95 each and have sold 40 or 50 now with positive feedback from customers as well as my own personal experience.