Best controller for 12-16 cells?

[nitrostarter]

I run a 7XL/BK18120 combo, geared at 16/51 and on 16 IB3800 cells. I just radared it at 44mph, and it gets there pretty quickly.

Runtime is prett decent, I can get about 15 good minutes of hard running. I haven' raced yet with the IB3800's yet, our track is being overhauled for some airtime.

CVDs, Steel Idlers, and diffs upgrades are going to become a necessity when you start running it hard.