I have a Zippy lipo, its in my signature. I like it so far. I put some serious stress on it in my RC8 Electric conversion. Price is hard to beat, dont know how long it will last, but for the 68$ I paid for a 4s, i dont eally care.

Balanceing is a good idea, you dont have to, but if you do it from time to time your pack should last longer. I always balance mine, why not, its not hard.

buy a Zippy and try it!

Trout