: My point is that I would have had 10 years of superior performance
: with eVent fabric compared to Goretax.

Define "superior performance". You seem to believe that all that matters is breathability. What really matters for sea kayakers is keeping cold water out. If you want breathability, go naked. The reason for any drysuit at all is to keep cold water out. Goretex replaces the suit when they feel that their fabric starts to leak due to the breathable layer delaminating.

For sea kayakers breathability is primarily a comfort issue. The safety issue is if the suit leaks.

Do you know what the failure mode of eVent is? Does the manufacturer guarantee that it won't leak? How well does the breathable layer hold up to wear and tear? Your linked report only discusses vapor transport it does not say anything about how the material holds up to use. It is quite possible it holds up quite well, but the manufacture makes no promises and I have not heard long-term use reports for the product.

: Perhaps you are confusing Kokatat customer service with the
: performance of breathable fabrics. When they make an eVent suit,
: I will look at them.

Kokatat provides the service because Goretex requires them to. If you have an old Stohlquist drysuit made with Goretex and the Goretex fails you will get a gift certificate to buy a Kokatat or equivalent drysuit. This is not Kokatat standing by the product it is Goretex.

An eVent drysuit http://www.nrsweb.com/shop/product.asp?pfid=2562 is within $50 of a similar Goretex http://www.outdoorplay.com/Kokatat-Mens-Gore-Tex-Front-Entry-Kayak-Dry-Suit While there may be a "brand tax" on Goretex, they will replace your whole suit if their product fails.

I am as cheap as the next guy. It took me a long time to bite the bullet to buy such an expensive article of clothing. I now have over 10 years of experience paddling year-around in harsh conditions with what I bought and I have been very happy with the performance. Further, I now have a suit that is as good as new and am still happy with it. If you have similar experience with eVent, please let us know because we would all be happy to save $50 if the product is truly better. If all you have is the results of one laboratory test to stake your life on, I guess I'm not going to be persuaded so easily.