Turnigy 6000mah 65-130C Nano-Tech stick pack, £250 for 6 from Hobbyking (including paying customs charge).
LRP 5900mah 65-130C (basically the same thing) £95 for ONE from the UK.
I've had my Turnigy LiPos for about 12 months now, I can't detect any difference in the performance, they still balance up well when charging, I can't fault them.
If you're looking for saddle packs I think the equivalent to my batteries are here:
http://www.hobbyking.com/hobbyking/s...ddle_Pack.html
I'm sure the LRPs would perform just as well, after all they are the same battery with a blue case!!