Rab Strata or Marmot DriClime for 30 degree temps?

At 30 degrees while hiking with just a Cap 2 or Cap 4 baselayer top, the Marmot DriClime would be borderline too hot. I would probably go with an unlined windshirt/hoodie while moving, if I got chilly at 30 degrees. Think of the DriClime as windshirt/light fleece combo for warmth. It's surprisingly warm. Doesn't take a very thick lining to be warm when coupled so tightly with a wind resistant shell.

I think the PolarTec Alpha would be a furnace at 30 degrees while moving. 30 is just not that cold. I really don't go for insulated layers until I stop. It doesn't matter how well something breaths if you are completely overheated and sweating like crazy. At 30 degrees, just a Cap 4 baselayer top is plenty warm enough for me — unless there's wind.

I did pick up a cheapo summer sale deal on a Marmot PolarTec Alpha jacket. Looking forward to trying it out this winter, but I doubt I'll be wearing it while on the move. I see it more as a water/wind resistant alternative to fleece.

I think I driclime fits your criteria well. If you're marching (or skiinning) up hill for a while, it might get too hot, but for intermittent windy (alpine) conditions at 30, the driclime with a thin base is great. Just unzip it and vent if you're getting hot.

Great. Thanks for the advice. I might actually pick up the Ether or Stride because I'd really appreciate the pockets.