C ratings are often exaggerated, so take them with a pinch of salt. Basically, multiply the capacity of the battery by the C rating and you should get the current handling ability of the battery. So in the example yo have listed, 25C x 3200mAh = 80000mA = 80A.
Now that ESC is theoretically limited to 45A, and is fine with that motor, so your battery will comfortably cope with anything the motor can throw at it, even if the C rating is optimistic.
Performance (punch) on the track is more subjective - I have yet to have a bad LiPo, although I would add that the one budget LiPo I did own needed a lot more balancing after each run than the more expensive ones. LiPo is a big step forward from NiMH, not only in performance but in lifespan and consistency from pack to pack.
All in all I think the Core combo you've linked to is a bargain and will suit you well. Just be careful with the servo you use, some (Savox especially) are very power-hungry and can cause issues in 1s Mardaves. I always use Futaba.
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