You might want to check out LL Bean' s Supprescent coveralls($229). Supprescent is W.L. Gore' s (the same co that makes Goretex) entry into the scent control arena. Supposedly, supprescent doesn' t wear out like the other scent control clothing(scent lok etc.), so you don' t need to worry about replacing it every couple of years.

Bean' s also has a gore-tex/supprescent parka and rain pants, but that' s a bit more $$ ($349 for both)and if you already have rain gear you can just wear the coveralls underneath.