Good choice! NeuEnergy packs are nice: got my Rustler to 82 mph on 4S, pulling close to 2000 Watts @ about 125 A.
Because of that I will be using them on my new project - Megatron:
Will be running a Hyperion LCX 5350 5S on the Rustler during testing coming up. Depending on what my data logger shows, I might have to go to a NeuEnergy 5S on it...