khouse i would recogmend neopreme waders for 2 reasons. #1 they are warmer! #2 they float, so if you ever do have a flooding accident they float! i also have a farmer john wetsuit and i put the top on over my waders. this keeps me warm and prevents accidental flooding. if i do happen to get into water over the top of my waders it takes a little while for water to actually get into waders. i have stepped off into deeper water quite often and quickly retreated to water that wasn't over the top of my waders without any water entering my waders. worst case senario some water does get into my waders they act just like a wetsuit.
i bought my wetsuit on ebay for $25.00 and got the waders for $30.00 there also.
becareful! cold water doesn't take long to lower your body temp to dangerous levels.
hope this helps
steve