VESC 6 is almost out - should have a beta version in a week or two. I would guess in a month or two they will be available to all but will be expensive until others start making it.
DIYElectricSkateboard or Miami boards are good quality and value VESC 4s that should perform great 10s and under
OllinBoards is a high quality VESC 4 (great warranty + high quality soldering) and seems to hold up well to abuse (12s foc)
VESC-X is a slightly modified direct fet version of the VESC 4 that promises higher amperage - not a lot of info yet on it though