im sorry but it is such a wast for you to run studs here... we do not see enough snow or ice to justify it. i do SAR, and snow camping and wheeling, and im driving up and down the gorge at least twice a month. i will guaranty i see way more snow and ice than you and i would never run studs -especially in a 5th gen with all its new advances in traction control and stability control... its been proven that studded tires on wet roads are worse than a hwy tire as far as traction, and 90% of inclement weather we see here in portland/vancouver is rain. we see a few small snow flurries every year and every couple of years we see a couple inches of snow that last for a day maybe two, and like every 10 years we see 6" or so of snow that will stick around for a day or two. if you need to, put chains on, but i still dont know why you would even need that, ODOT is always out plowing roads and besides 70% of our roads get shut down when the snow comes so your not diving anywhere anyways. all studs do is rip up the roads and make driving in the rain more dangerous for everyone. this is not the mid west or new england.
i cant agree more the rubber compound in snow tires is so much better suited for snow and ice, they have so much more factory sipping.
i have run the blizzaks DM-V1s and loved them the traction i got with them in ice and snow was unreal! i took them snow wheeling one time with some guys who were running big open MTs and had way better set ups than i did and i kept right up with them in the deep snow, but when it came to hills and other things i would walk away from them. i even had to tow one guy up the paved road to get to the trail.
i would still have those tires and use them if we saw more snow and ice than we do. it was kind of a waste for me(i got the tires brand new for free- someone bought them and never picked them up from the dealer i worked at so we sat on them for a season and instead of sending them back and costing us more money i just asked if i could use them and they said yeah.) so i ended up selling them after one season cause i didnt have a spare set of wheels at the time. if i had the money id get another set cause those tires are hands down the best snow tire i have ever run. very predictable on the road and even in snow and ice. they give good feed back and are responsive and reassuring. i have run other blizzaks in the past on other vehicles and always had a good experience. idk maybe it was just the 4runner that made these tires stand out so much better. but i have run the blizzak lm60's on audi quattros in the lake tahoe area and they were also outstanding tire.
check em out
http://www.tirerack.com/tires/tires.jsp?tireMake=Bridgestone&tireModel=Blizzak+DM-V1