What was your take on the Traxxas Velineon system in a crt.5? They seem like they might be a great 3s system for 10th scale that is cheap. They do seem to lack in programming like drag brake.
It would be more wise to buy the Velineon Motor and the Sidewinder ESC.
I was looking at running the Tekin Redline Motor in my CRT.5. They have a few more kv ratings http://www.teamtekin.com/blmotors.html