Maybe I've mentioned this before. Sorry if I have.
When I'm shopping for hiking wear, at Sierra Trading Post or REI outlet, for instance, I don't just shop under hiking clothes, I also look at running and cycling clothes. A lot of it is really high tech, very light, and more form fitting than most hiking clothes. Both, but more so with cycling clothes, are designed to be more protective on the front, since you are moving forward at a good clip. The reason this also makes sense for hikers, though we are moving slower, is we are wearing a backpack. Don't really need Windstopper on the back, or as much insulation on the back, because we have a backpack protecting our back. A lot of cycling outerwear has pockets In the back, which, obviously aren't functional while wearing your pack, and a possible source of annoyance, but can also serve to carry a water bottle, a windbreaker, and some snacks, if you want to drop your pack and make a quick dash to the summit, or down to a stream to get water. And, of course, if you run or cycle, they serve double duty. I find some really fantastic bargains on running and cycling wear and don't pass it up just because it wasn't intended as hiking wear. Recently I've bought a lot of Gore bikewear with Windstopper. I bought it mostly for cycling, but I'm not adverse to throwing it in my pack. Really nice stuff. Pearl Izumi makes fantastic stuff too.