I'd say go for the Hobbyking batteries because i use them and the get some god reviews plus you can now get them in the USA,i'll leave a link for you on some 3s batteries,all you have to do is look for the one you want and if you want to get it in the USA look for the little USA flag under the price,if not the postage from HongKong isn't tat bad and they still work out a lot cheaper than most of the other brands out there.
Turnigy 3s 1300mah 20c $8.95
ZIPPY Flightmax 1300mAh 3S1P 15-25C $6.99
Plus they Sell a good few other brands to so just have a look around until you find the ones that suite you,good luck.
http://www.hobbyking.com/hobbyking/s...=&LiPoConfig=3