I use Dynamite's Speedpack 3 cell 4200 Mah Lipo 11.1V in my HPI Bullet Flux & Venom's 2 cell 5000 Mah 7.4 V Pack in my SCT... Both batteries are fairly priced & I am very happy with both brand's My vote is for
1. Dynamite 2.Venom
If you can afford another 12 bucks Id recommend the AC680. Its the upgraded version of the AC6. Either one makes a good starting charger but if you really get into electrics you'll want to invest in a DC power source (you can either buy them or make one from on old PC power supply. I believe I had an extensive thread on how to convert a PC power supply in this sub forum) and you'll probably want to invest in 1 really big charger like a 400 or higher dual charger or a couple of smaller 150-200W chargers. Just depends on how big your lipos start getting and how many you find yourself wanting to charge at one time.
Oh and gensacearespammers is usually my first choice of lipos, Sky is a pretty close second if they dont have the particular Gens in stock you are looking for. Or if you want to spend a little extra the SPC packs are even a little better than Gens in my opinion.