Thanks for the info on the tires linc. I'll try to make it to the LHS this evening.
I also would ideally want to stay from Max Amps packs, because I haven't seen the performance I am looking for from my 1 and only Max Amps pack (2s5p 5500mAH saddle pack for my RC10GT).
The only thing I'm worried about on the Flightpower packs are the length of them. If I measured correctly, the longest pack I can fit is 142mm on the current battery tray. Of course I could always modify it to fit a larger pack, but I want to keep the current battery holder as it is, if at all possible.
I found this pack, which really interests me right now:
http://www3.towerhobbies.com/cgi-bin...?&I=LXRVU1&P=7
It is only 30 grams more than the one Linc linked to, but 30 grams less than the Max Amps 4s 5000mAH, higher mAH and 139mm long. The downfall is that it is $45 more than the other Flightpower... The Max Amps 4000mAH 4s pack is also 25 grams lighter than the 4270mAH Flightpower pack...
I want to get a flightpower pack that is 4s, and no more than 142mm long. So if you see one, let me know.