4.6is - 18" rims for studded winter tire options?

[Adas]

Hi all,
I'm looking to run some studded winter tires on a 4.6is (I live in Snowmass, so I really want to have studs rather than just get some winter tires for the stock 20" rims - although if someone knows of some good studded tires for that configuration, please let me know!)

Any thoughts? Discount Tire here in Glenwood Springs (CO) have suggested some 18" rims which they could then put some studded tires on. The ones they have suggested are the Drag DR-37 I think - they kind of look like an E46 M3 CSL rim if you know what those look like (albeit in a smaller set-up as the CSL ran 19" from memory). The full package (rims, tires, studs and on the car) runs at $1,300 which is pretty fair. I can't find any pictures online with an E53 running those rims though, I'm just wondering what other 4.6is owners are running in the mountains or the deep snow?

Thanks!
Adas