Thanks for all your input, guys.
I called for quotes around here, and the prices just weren't that great. $10/tire for install plus an extra $5 for valve stems? That just doesn't seem right.
Well, I've decided on the Yokos, because of the very long 80k warranty and their level of quality. There weren't very many reviews on them on tirerack.com yet, since they just came out. So there's a little bit of a risk involved. I really need them to live up to their snow claims. Most of Ann Arbor isn't plowed regularly!
I've also decided to get them through tirerack.com, since the price is so good, and the local installer they found would balance and mount them(w/valves) for $15/tire. Also, the $75 Crutchfield card also swayed me a little.
Thanks again, guys!