New guy here, advice appreciated

[Theo]

I advise using NiMH batteries for a beginner. They are easier to charge, simpler, safer and cheaper than LiPo. They don't have the density of LiPo, but are so much safer. You don't want to end up like Chompalot, do you? Hobbyking have a good range of well priced NiMH batteries, two 7.2v packs would work nicely. The Botbitz 30A would work with featherweight motors, I think, and ranglebox sells the brushed version of it for a reasonable price, or get a FeatherTwo from Rory, though I think he's quite busy since robot wars came back.