For launching and retrieving I use Cabela's coated nylon chest waders - I have to get in fairly deep with New Moon (heavy deep-V). These stay in the truck.
For general rain gear - walking, standing in the cockpit, etc - I like Cabela's EXV stuff (coat, but also pants if it's heavy rain, or rain and wind). Gore Tex, totally rain proof, comfortable. High quality and fairly durable. Add Gore-Tex light hikers in a chukka height and your feet will stay dry too (this is crucial).
Even when it's fairly cold (the PNW, not Duluth) the EXV jacket over a fleece vest is about all you need to stop the wind and stay warm, so we don't carry heavy coats when cruising.
For active fishing and fish cleaning, or other messy or potentially damaging work, I like West Marine's Third Reef gear, especially the chest-high pants. Tough heavier nylon, but not breathable. Combine these with Xtra-Tuf boots and you'll stay dry for sure, but you'll get warm and sweaty if it's not too cold and you're in them for a long time. Very long-lasting.
All these are moderately priced, and have proven themselves in lots of cruising.