Need Help Choosing lipo's

[brushlessboy16]

Hey guys, trying to put together a Christmas List. Im getting prepared for racing at Trax70in Browns Mills Nj. I have most of the things I need layed out- excepts for batteries. Currently I have 1 zippy 5s 4000mah pack, but my track's mains are 15 minutes long- I doubt 4000mah will make that long racing. I need help/suggestions on Lipo's. My track does not necessitate ROAR legal packs. Also for you racers out there, 4s or 5s?
My choices
-2x Enerland Hardcased 2s 5100mah$99 each
25C (127.5A) cont, 50C (255.0A) burst

-2x Reedy 2s 5000mah Pack$94 each
100A continuous, 125A-175A burst

-Elite 4s 5300mah Cell 30C
30C(159 amps) continuous, Burst C Rate 50C - (265 amps)

-ZIPPY-H 5000mAh 4S1P 20-30C Lipoly Pack $90 each
20c(100a) Continuous, Burst 30C(150a)

-NEU 5000EP 4S1P pack $195 each
30c(150a)Continuous, 60c(300a)






Please feel free to suggest other lipos to me, im trying not to venture past 210ish in price.

Thanks for the help in advanced
-Ben