Interesting thread...
My take is that chains will at some point be necessary on a long grade like the op has. Some pavement marking will occur regardless of chain type. My preference is the Duo Grip style or 2 link ladder. The Duo Grip gives a smoother ride and is less prone to slipping when ground contact is between links like on the ladder style. There are lots of snow / ice conditions and chains.
On ice, machine weight has little effect on traction. In 95% of the conditions I plow in machine weight has a huge impact on traction. My choice was a heavy tractor (
L4060, cab, loaded rears) at about 7k lbs with a front blade and rear blower. Generally speaking, weight is king in snow removal.