Need Help Choosing lipo's

[Dagger Thrasher]

I can't really make a suggestion based on experience, but have you considered the 5000mah 35C Elites? I've heard nothing but great things about them, and their price is awesome. They're sold out right now, but I'm told some more should be coming in within a week or so (I emailed Mike there as I'm looking to buy some myself). Only possible downside for your app is that they're an unusual shape, and obviously a tad lower capacity than the 5300's.