If you put the BFG's on your car, I am betting I can out corner you with my Hummer H2 filled with a bunch of hottie chicks. I had the BFG's on my car 1 day and it was miserable. They DO hook in a straight line acceleration though. I find that my Pilot Sport Cups are awesome tires for the street. They are designed for road coursing, so you can take corners fast, and they stick better than pilots. Never ran Kumho's, so can't give you a comparison there.
-manny