It is also worth considering one of the new Turnigy Super Brain series of ESC from Hobby King. They are programmed from your computer via USB. They also have data logging so that you can keep a true record of throttle position, amp draw, ESC temp, battery voltage and motor RPM throughout your entire flight.
These ESCs go for about a $10.00 premium plus $8.00 (approx) for the USB interface. But they replace well over $100 worth of test equipment to obtain all the same data. Best investment I ever made. I've never read a post on any board from anyone else using these Super Brain ESCs so they must be fairly new. I love mine!