HT batteries has a great setup for everything from radio to car to starter box, plus a balance charger. I think they're HTBatteries.com or something like that.
For the last 1 1/2 years I've been using the Protek Rx packs from Amainhobbies. Also some of my vehicles have the Common Sense Rx batteries. All of them work great.
For the radio I also have a protek and common sense lipo.
For my starter boxes I use the HT batteries 2100 14.8v lipo.
I use the Duratrax ICE chargers. I've been reading good things about the new Duratrax Onyx chargers though.
At first I was hesitant to start using lipo batteries because of the frikkin price. But then I started finding them on sale, and discounted here and there. So now I only use lipo. Awesome.