I'm wondering what you guys would suggest for an affordable ESC for a mini?

I've been using the stock one without any issues, but I'm considering an upgrade. Not neccesarily for the sake of going faster, but for reduced size, and possibly weight savings. (which may lead to going faster)

I used the word "affordable" but I suppose I should clarify: Installing a $200 ESC in a mini, in my mind, is a waste, and it goes against the spirit of the series. What I'm wondering is what would be the best controller I can lay my hands on for less than $100, or preferably under $60.

BTW: Just for laughs, I installed the stock ESC from my Axial AX10 into my M04. It goes at least as fast now as with the stocker. It's also smaller. Cool!

Jim