What batteries to buy and why?

I've been considering both the Kokam and flightpowers because they are about the same price. I know that many have been touting the flightpowers here lately, but the Kokams are premiere cells in their own right too.

I don't know about GD, but from my perspective, the wire routing coming out of the Kokams are what I need, and from what I understand, the Kokam cells are of a safer chemistry and are more tolerant to overdischarging. The Kokam cells are also supposed to be pretty tough.

Since I've destroyed so many lipo packs, maybe a heavy duty pack is just what I need.

I'd also consider running two of the trakpower packs in series, but I don't want to sacrifice the convenience of the charger/balancer interface that I have with the tp 1010C and balancer.

BTW, can two of the flightpower packs be charged in series? If so, is there a way to wire up the packs with a more conventional balancing tap so that I can use my tp balancer?