For the small price difference between the trakpower and maxamps packs, I'd go with the trakpowers.

Although I do like the maxamps packs for the bang for the buck that you get, I'd stick with the "better" packs for such a small price differential. The maxamps packs just get to be more appealing at their price when you start talking about 4S and 5S packs. For 2S packs, it's a no brainer.

As I said, I do like the maxamps packs for the price, but I have had my share of problems with them. Stuff like cells puffing when I'm not pushing them that hard and packs containing defective cells. I just got in another pack that was a 5S 5Ah pack and the first cell in the pack won't charge up to 4.2v. The balancer is running through the whole charge cycle.