I have the Redington's. I fish in them about 60 days a year, and have had to replace them about once a year due to leaks in the foot seams. Redington has an unconditional 4 year warranty, so my $170 investment will keep me dry for 4 years, save the 3 week wait for replacements. They're pretty tough and comfortable. I hear the best comments about Simm's, but they're twice the money with half the warranty. Check out the FlyfishAmerica web site. I think they had a good online article on breathables.
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If every fisherman would pick up one piece of trash, we'd have cleaner rivers and more access.