agreed with everyone.....no point in upgrading anything else power-wise until you have the packs to support it. if you cant afford lipo now, then save up. you can get two hard case packs and a good charger at hobbypartz.com under 100 shipped.
http://www.hobbypartz.com/98p-25c-40...-hardcase.html
and
http://www.hobbypartz.com/thac6smbachw.html