Which One????

[LiPo Power]

Two of them:
-5800mAh, 20-30C, 2S, 7.4V
-5000mAh, 30-40C, 2S, 7.4V
Which one should I get?
Never mind the price......
It will be used on BJ motor with 120A ESC, 14.8V, mono hull....
Thanks
Robert