I have to agree whole heartedly with the post about simms. After years of trying to make it with cheap waders I bit the bullet and bought the simms guide model breatables. I got tired of buying a new pair of hodgemans every year. If you dress properly under them they are as warm as neoprene 1000 times more comfortable and more durable that neoprene.
I have also heard good things about dan balieys breathable waders.

do yourself a favor get out of neoprene.. you'll spend more time out fishing because you'll be more comfortable.And you'll enjoy it more because your comfortable