REI Ultralight pants: http://www.rei.com/product/794209/re...mens-30-inseam
Got 'em for ~55 bucks after 30% off REI item coupon they sent over email. Water bounces off of them, and it's pretty much windproof. Don't sweat much inside of them either. Down to ~30 you could go w/ just these, lower and you'll want to wear some liners under 'em.