RE: vtail servos
V-tail elevators I use primarily Futaba 9650's, but have used JR 3121, JR 3421, Airtronics 94761, Hitec 5245, Expert SL 451, futaba 3102, and Hitec 225's. I had a set of 85's mounted and was going to give them a try on a 428 bird, but I just wasn't satsified with how they were centering (they were a little sloppy around center) and replaced them with a set of JR 368's that I had laying around.
I've tried just about all of the servos, and the Futaba 9650 is my newest favorite for 428. Its got the speed, torque, nylon gears, and is lighter than most.
For the best lower cost option on elevators, the Expert SL 451 is still my go to economy servo.
For ailerons, I like a servo a little stronger than the Expert and stick with either the futaba 9650, JR 3121, or JR 3421.