if you want to go lipo, I would recommend 3S2600s. Irate and polyquest have them. they are rated 10C which is 26 amp and weighs about 5oz. (saving of over 10 oz over 8cell, with more power and more flight time compraed to 8x3200) they cost about 75 bucks though. you should be able to fly about 15 minute without problem.