I have a pair of LaCrosse AlphaBurly BrushTuffs (or something like that). They are the LaCrosse waders, neoprene, with some sort of rip-stop fabric built into them that will apparently keep rips in a straight line (should they ever happen) for easy repair. Mine have never ripped, and they are in their second hard season. They have 1000gr of thinsulate in them, and keep me very warm and dry. I have been very pleased with them.

Other brand I would look at is anything made by Cabelas, since they guarentee stuff for life, if you ever have a problem with them, send them back and they will send you a new pair.