Yup, I agree on the Ready Mix. Great Jacket for features and the perfect balance of breathability and weather resistance. It also dries very fast. The only things I do not like are the single waist drawcord and Pattigonia's soft hood closure thingys… but that is minor. I will buy another one just in case they discontinue the jacket.
I noticed your other post about the Gamma MX Pants and did not respond given that I have not used Powershield on the legs (just in jackets and gloves).
As you know, the stretch of the stuff is wonderful, and it does block a goodly amount of wind, but breathes better than hard shells. Even if it didn't, the fit and mobility would be worth the cost. I tend to wear my Gamma MX jacket for cool weather rock climbing (nothing in bad weather or when weight is an issue), and after 4 years the cuffs are starting to go, but otherwise it has taken a real beating and has proven durable. Good fabric for certain activities, juts not for when I am wearing a pack or working uphill- or when it is raining.
My only concern with the Gamma MX pants would be that the seat and knees of any pants that I use in winter tend to get abused a bit, and the DWR wears off there first. With non-stretch wovens, in my experience, there is not as much moisture absorption as with stretch wovens in these areas.
However, I bet the Guidelites absorb a bit too so you are used to working with it, so this is not really a slight against Powershield as it is against stretchwovens in general.
To be honest, I almost bought the Gamma MX pants for ice climbing and winter packing, but am between sizes (30 inch waist, 33 inch inseam). I went with the REI Taku pants and don't regret it because I now have two large holes from my frontpoints in the knee area, and that would be horrible to do to pants as nice as the Gamma's. Of course the stupid velcro waist cinch closure on the Taku pants managed to tear the fabric of my well-loved Cloudveil Epic anarok to shreds… stupid pants.
If the Gamma pants had fit me, I'd wear them tomorrow when I go out climbing and for my daily 5 mile hike. Since my legs do not get as hot as my torso, the more limited breathability and additional warmth would be welcome. POwershield will block wind, and being above treeline in the Dacks is a place where I'd sure want that, but there is a noticable difference in wind resistance between it and hardshells (speaking from my experience with jackets). It might be very well suited to winter use in the Dacks.
If you have found them at $100 off, I'd grab them. At that price, you could always sell them and maybe not even take a hit if they did not meet your needs.