The novak XRS is a great inexpensive ESC. It handles motors all the way down to 15T, and works great. They come pre-wired, with bullet motor connectors for the motor, and tamiyas for the battery. And they only cost around $50.

[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGNG5&P=ML]Novak XRS Reversible Sport ESC [/link]