At Steveston Marine and Hardware, they have the Sedge breathables for $190.00. Look pretty decent. I recommend wearing breathable waders with polar fleece pants (I got mine cheap at Nadex. $10.00.) because the polar fleece breathe. Yes, even the cheap ones. Don't wear cotton sweat pants because the material just absorbs the sweat and the extra money you spent on breathables are wasted. It's all about moisture management and moving sweat from skin to the outside. If you get cold, you might want to think about neoprene. Generally cheaper than breathables, and they come in thickness ranging from about 3-5 mm, with the thicker being warmer and also more durable. Cheap neoprenes made by Crystal river or Browning start about $80-90 and top out about 350-400 for the really good ones. All the manufacturers mentioned previously are reputable. With boots too, you get what you pay for. Definitely get boots with felt soles as they provide traction on slippery rocks. I've used the Hodgeman waders and while not bad, they don't give you lots of support in the ankle. But, they are reasonablly priced. Good luck. Try to buy the best you can afford otherwise you will find that you keep on upgrading and spending more money in the long run.
I tend to agree with Fulcrum. I rarely go over my knees and use my waders mainly for rain protection and warmth too. Waders are designed to keep you dry. They shouldn't make you take chances in the rivers you wouldn't otherwise take if you didn't have them...