root...Sounds like good servos. Anything in the 80-90 class are gonna be fine. That's plenty of torque. I use a 4.8v 1650mA battery and I can get 6 flights easily. I fly 13 minute each flilght. I have 2 digital and 3 analog servos. Also I've heard the 6v batteries dump a little quicker but I don't have personal experience.
Thanks
Barry