For the times when I use waders... Simms has my vote.
Have had the same pair since 2006 and I am not easy on my gear... Recently they just started leaking and sent them back to MT. For $15 I had brand new anatomical neoprene booties and they fixed all pinhole leaks. If you are considering a pair I would recommend that you spend the little extra for the Gore-Tex models. Other waders may work just as well but I will always spend my money on Simms.