Nice looking CRT.5 you had linc.

Here is the Max Amps 5000 pack:
http://www.maxamps.com/Lipo-5000-148-Pack.htm
Although I think I was mistaken by saying it was 2p, as I also don't see any 2500mAH packs. I just assumed it was 2p since it didn't say anything about it.
As for the weight, I was also worried about that. But I still need sufficient run time, and need a 4s lipo to reach 40mph... This pack is much better in terms of weight, but the mAH is a little on the low side... Any other recommendations on batteries? Most of the high end packs (Flight power, Trakpower, Neu, etc.) are way too long.