Should've mentioned they have a new HV esc. It's rated for 12 cells at 70-105a. I don't think it has brakes, but for $75 I don't think you can complain.
http://www.hobbycity.com/hobbycity/s...idProduct=9130
There's also a HV marine esc with brakes. It's rated for 5-12 cells and 80-180a. I'm not sure how it'd do though without water cooling.... It costs $75
http://www.hobbycity.com/hobbycity/s...hless_Boat_ESC
And we all can't forget the long-loved Turnigy sentilon 100A HV 5-12S esc. It's rated for 100-110 amps. Priced at $100 (
usa warehouse $115)
http://www.hobbycity.com/hobbycity/s...idProduct=4691
They also have a High Amp 150-200a 2-6s controller. It's $90.
http://www.hobbycity.com/hobbycity/s..._Brushless_ESC
The biggest one on the site (i think) - 5-12s, 120-180a. $140.
http://www.hobbycity.com/hobbycity/s..._Brushless_ESC
I guess I just made a list of big esc's.

Enjoy.