OUCH! The controller they have is NOT the one you posted, it's this one. http://kellycontroller.com/kbs3610140a2 ... p-502.html
Considerably more substantial. Not having worked with this yet, but planning to, let me say NO, that is still NOT big enough, at least if you get the motor they have, the larger of the two you posted. Just because it hasn't blown up YET doesn't mean it's not going to. Let me offer a bit of influence in the direction of http://kellycontroller.com/ksl4815024v- ... p-661.html
If you don't want to spend that, you can save $50 (At first) with http://kellycontroller.com/ksl4810024v- ... p-660.html
People with slightly larger RC motors have expressed their pleasure with http://www.rcdude.com/servlet/the-1614/ ... CE2/Detail
Yours being a big smaller if you get that 6kw motor, you might risk saving the $50 and going with http://www.rcdude.com/servlet/the-1815/ ... CE2/Detail
Well, that's funny about those motors you posted, though. My backordered motors from HobbyKing, matching those numbers, look just the same too. Say, you don't suppose one is a knockoff of the other, do you?
At least if you order from your source, you might see yours sometime soon. I'm just sitting here watching the grass grow as I wait for the mailman. . . .