My last set of ko2's were 285's i got 68K out of them, they are hands down the best snow tire i've ever used.
my current tire 275 Michelin ltx at2, they are smoooooth and quiet. no complaints, i haven't had them in the winter yet. but so far i really like them.
If i were shopping for tires today, i'd have to really think what my 90% of the time would be. highway, tow pig, i'll be giving the geolander's a good look, and the cooper at3 lt, general grabber at. we use these at work and have great service from them.
i also wouldn't shy away from the ko2's, if you can find round ones. they always seem hard to balance.