I know I'm a little late to the party, but I'd say that Kentetrek's are a very solid choice. There is a review here praising them http://www.outdoor-ranger.net/, however you might want to do your own research as well. They worked well for me when I was out hunting long hours and if they can last that comfortably they should be able to fit you as well.
Although I have to say that Georgiaboot also make a mean pair as well from what I hear.