I would take a hard look at the Gens Aces if you are just starting out. VTA doesn't put alot of strain on a battery (especially compared to something like 4WD SCT or Mod Sedan).

I have run quite a few different batteries (RevTech 65/6500, Orion 90c/6500) and not much difference in VTA compared to my Gen Ace 50/65c batteries. Remember you have a limit of 5000mah on the capacity side for VTA as well.