Don't go cheap, invest in a quality suit if you fish a lot.

I have BPS 100 mph suits. They are over priced, but over engineered with quality. One the single best investments I've made for cold weather fishing and I've definitely used them enough over the years to get my moneys worth. I imagine Cabela's version is great as well.

For warm weather I have some cheapo pants and a orvis light weight jacket that I like. Some people forget the single most important item that will keep you warm when fishing is something to block the wind. Even the cheapest rain gear is a must in your boat if it blocks the wind. I wear my rain suits more often when the wind is up than if its raining. We use a sportbrella if it starts to really pour.