I have very little luck with synthetic materials, such as Gore-tex, that make my feet more wet from sweat than the actual protection they provide. I really dislike any foam in my footwear, too. So, I have most of my boots custom made by the Russell Moccasin Company. I have worn a variety of handmade Russell boots from Alaska to Africa and find them to be the most comfortable, light weight, durable, water-resistant boots I have ever worn. I always order my Russell boots with double-vamps (all leather!) for moisture protection. Russell's are not inexpensive up front, but in the long run of things, I find them less expensive since they can be resoled and, overall, last much longer than other brands of boots that I have tried. Too, there are those times when you just can't put a price limit on comfort...especially after financing an expensive hunting trip on one end of the globe or the other.
Russell Moccasin Co.
http://www.russellmoccasin.com/index.html