I've got some Haiyin 30C packs on the way...the fact that they actually manufacture the raw cells makes me feel comfortable....will know more once the local track opens....

So far, all I've run in my 4x4 is Reedy 60C 5500 packs.....yes, they were great....but at $130 each, and one failed within 30 charges, I'm going to take a look at something else.