I would definitely recommend the 686 smarties. I just got a pair about a month ago so I can't tell you for sure how they hold up, but the reviews on them are extremely solid. They have a waterproof/breathability rating of 15k/15k so you should be fine there. They have a removable liner which is cool for just wearing around the house for casual sweats. They make the pants really warm with them in and a little bit cooler with them out. The material feels fantastic. It's got a bunch of great little features too which include: a lot of pockets (many of which are zipped), velcro adjustable waistband, the liner zips in and out, waterproof seal around the boots with velcro covered hole at the bottom of the gaitor to be able to adjust boa dial without removing this seal, and a bunch of other stuff. They also have some cool colors. I got cyan which is pretty much bright sky blue. They run really big. I'm 5'9 155 lbs and got the small. They fit perfectly with even a little big of bagginess to them. If you're a bit bigger, go for the mediums, if you're huge check out the larges.