You can run li-po's with brushed but the motor will burn out a little faster. For the li-po system, I heard good things about the Scorpion packs and charger. At Starluckrc.com you can get a brushless system.
For the motor
http://www.starluckrc.com/catalog/pr...99f5a7e642cdd9 For the controller
http://www.starluckrc.com/catalog/pr...roducts_id=135 that and a 8.4 volt li-po should get you 50-60mph.