Wren, my current winter rain coat is from Lands End (water resistant, but not waterproof). Just bought a new one at the Eddie Bauer outlet in North Bend (another one at the Supermall in Auburn) which is waterproof, but haven't tried it out yet. What I liked about that one was that it had several linings you could buy separately, so you can have a simple waterproof jacket, but then add heavier linings to make it warmer - I'm a big fan of layering. REI can have some good sales on things. I'd also suggest the Burlington Coat Factory that was already recommended - usually lots of choice there. Another place that's pretty good price-wise is Fred Meyer - we go to the one in Burien. Don't know a thing about wading boots though, sorry!
BTW, I think most people here don't shun rain gear since it's such a necessity. It's umbrellas that the locals don't use, and if you've got good rain gear and a hood, you generally don't need them. Haven't used once in the 7 years since I moved here.