I've been using Cooper Discoverer M+S for the past several seasons:
http://us.coopertire.com/Tires/Light-Truck/DISCOVERER-M-S.aspx
Discount Tire has them/can get them. LRE, I've used 215/85-16 and 235/80?-16 - forget. Two sets of the wider ones, one set of the 215s.
All were studded, all were on a 2wd Ford 1-ton van towing an open 2-place. I always got there.
The 215s seemed like they went too far in the "narrower snow tires are better" direction - I swear I had more traction on snowpacked FS roads (not plowed, softish, but not _soft_) with the 235s (or were they 245s? forget....).
Either way, though, they were great. Mileage, ehhh, it is a soft winter-only tire. I ran them year round a couple of times; if at the end of a winter season, they looked thin enough that I thought I'd want to replace them before the following winter anyway, I just left them on.
I carried chains. I needed them several times, but mostly on FS roads; getting out of the Vail Pass turnaround a couple of times, one time I preventatively chained up going to Corona (probably would have made it without, but that's one of those "if I did NOT make it....." deals), driving from Steamboat to Buff Pass, breaking trail up the road, 8" down low, 16" at the top, about halfway up, I needed chains.
Not bad at all. I really like them.
HOWEVER, I'm jumping ship this year - replaced the 2wd van with a 4wd Dodge. I got 20-30k out of a set of Coopers (and anything past 20k or so I was starting to think about "new tires"). I figure if I get 40k out of the Duratracs, I'm ahead.
The new Goodyear ice-grip/studdable tire is appealing, but the Duratrac is MORE appealing to me because I can run them year round; IME, most _winter specific_ tires just dissolve on warm days/dry pavement - which we get a lot of in Denver, even in the winter. The Duratrac gets rave reviews here and elsewhere, and while it IS studdable and it allegedly works great in snow, it is not (to my knowledge) a "snow tire" compound; it is intended to be run year round, unlike the Cooper/Blizzak (Bridgestone makes a LRE Blizzak)/General Altimac (which I've had on my cars - at least the car version is pretty awesome).
I'm a tire junkie. I'll certainly post with impressions of the Duratrac; my Michelin LTX M&S are pretty thin now, but not worn out - I really SHOULD run them for another couple of months, but the pull is strong, I want to get some real tires on this thing. The Michelin is a great highway tire, and supposedly good in snow (the M&S variant), but I REALLY like studded tires - IMHO, they give that extra chunk of grip on bumpy, snowpacked parkinglots.
RH