I like the 285s quite a bit. A lot of my happiness stems from the fact that the KO2s, in retrospect, were not that good. My new tires seem to be better in every way, outside of road noise and gas mileage. No more steering wheel shake, not even a little bit (and it was bad, I just learned to live with it). I'm happy with the size, but may go to 285/75 the next time around.
And yes, my front bumper was trimmed for higher clearance, and it has the added benefit of being out of the way of my tires as well.