You are concerned about your feet sweating and you want a rubber boot ??? Rubber does not breath. Neoporene does, but only a tad better. I will use a neoprene/rubber Irish Setter brand boot when I hunt in this particularly water logged swamp. Even hip boots when the water is up 2-3 feet deep .... but man at the foot sweat?

I have found the Danner Pronghorn with 400 gr. Thinsulate insulation to be a good boot that will not break the bank. It is warm enough for most of the colder weather down this way. Water proof and breathes nicely. With good care you can get several years out of a pair. I hunt a lot and am on my 4th season with these boots ... and they look great still ... just scuffed up from normalm wear.