I have the 4168 in non sensored, and have been nothing but happy with the motor. I would think these are pretty decent.
I have 2 of the matching esc's. The esc you linked are the Ezrun, not Xerun, the Xeruns are listed with the motor, and have been sensored. Any way, one of the esc's get's ran sensored and I can't say it's all that great. It does not have the buttery smooth startup that other sensored esc's have. Fine for bashing, but not what I would consider smooth. Perhaps the Exrun stuff will be better.