Back from Costo. Turned out to be a bit of a waste IMO. Very limited selection. Prices incl tires, rims, install, taxes, all IN:
-Xi2: $1075
-Blizzak DM-V1: $1045
So this means JoyCity is looking pretty killer. Altimax Arctic for under $800 out the door, that's a heckuva deal. The Xi2 and DM-V1 are both $300 more. That's a significant cost difference, certainly enough to make me take a pass and go with the Alimax Arctics instead.
The BFG Winter Slalom KSI are a hundred more ($885) but are they worth it? Can't seem to find too much on them. The Altimax might be the ones to beat.