Cabela's stout breathables. They go on sale all the time. Best waders I've ever had. Good from early teal to late season, plenty of room to layer up.http://www.cabelas.com/catalog/product.jsp?productId=731364
Only negative is they have no stretch like neoprene. I'm 6'4" and don't have a problem with it tho.
I have the same ones. Love em. Just wished they made a tall version. At 6'1 they dont stretch mucho, but thats ok, i loosen the straps totally. Its nice and superlight. Just watch out for thorns. I even wear em when its 15 degrees outside, just layer up and 1 1/2 boot size up