+1 on the HobbyWing Xerun ESC's. Been running multiple Xerun's for 2+ years now without issue. Only ESC I will run. Also, I always run an external Castle 10 amp BEC on any 1/8th scale or 4wd short course.

As previous poster said, if running 4s go with the SCT-Pro. It's smaller and allows you to shoe goo the Castle BEC to the side of the ESC and still fit in the "hole" where the ESC goes on the Teknos. With the Xerun 150 amp you would need to mount the BEC somewhere else.