http://www.sportsmansguide.com/net/Main.aspx? for $89 if I recall. They had three sizes, and I got the largest, and I'm glad. They were never difficult to walk in. Guidegear brand, 10x32 I think??? (Even though I only weigh about 170 (180 after thankgiving! lol))
I think it was the older version of this: http://www.sportsmansguide.com/net/c....aspx?a=898600 (Of course, that was almost 10 years ago, but they've held up perfect.)
ps: Of course, now that I think about it, you better add on to my weight 5-10 pounds of clothes and a 50 pound pack.