The best waders for louisiana are from orvis. They are breathable, as comforable as a pair of jeans, and you doesn't restrict your movement in and out of the blind like neoprene would. On the rare cold mornings, I wear the drake jean cut wader pant that is fleeced lined. Expensive, but they will give you a brand new pair if there are any defects!
http://www.orvis.com/store/product.aspx?pf_id=3C20