My .02 worth:
It all depends on your budget, if you want to spend as little as possible, neoprene and a pair of cheap wading boots are the way to go, you should be able to get both for under $100. If you can afford it, breathables are awesome. I have a pair of Flytech's that are a low-end breathable, but have held up nicely for 1 year, and being able to layer for the weather is great. Glad to see there is another fly-buddy out there! When are we going fishing?
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Flyfishing, the gentler art of ripping lips.