What batteries to buy and why?

I'm going to go with the Kokams for sure. They may be second in line in terms of performance, but I think they'll be more tolerant of the harsh conditions to which it appears that I subject my equipment. I tend to charge my batteries and then run them until the lvc kicks in. I do 90% of my running on a track, so it's constant on/off on the throttle and I need heavy duty batteries.

Although there seems to be a flightpower craze here, there seems to be quite a following for the Kokams on other sites. I'm going to give them a try. They can't possibly be worse than what I had before.