CRT Conversion Questions

ZIPPY Flightmax 5000mAh 5S1P 30: http://www.hobbycity.com/hobbycity/s...idProduct=8589

What about ZIPPY Flightmax 5000mAh 5S1P 25C http://www.hobbycity.com/hobbycity/s...idProduct=8585

FYI, weights are 632g, 628g and 650g for the 20C, 25C and 30C, respectively.

Also, it is roughly $15 more to get 25C from 20C, and another $15 to 30C. Obviously, the higher the C, the better, but is it really worth the price and weight difference? It might be that the 5000mAh 5S1P 25C is optimal.

What do you guys think?

I'd like to know myself since I'm planning my next conversion - just got a Hyper ST Pro kit yesterday.