RE: brushless without using lipo
You'd be wasting your money on NiMhs if you're gettng a brushless system. If you HAVE NiMhs just lying around, not buying new ones, sure, use 'em up if you want to. But be sure, you WILL kill them in fairly short order, depending on how, and how often, you use them. Just go Lipo, man, it's what the things were designed for. NiMhs are OK for a mild brushed-motor. But brushless? It's not too strong a statement to say, they're required.