I'm a little confused by the current state of waterproof/breathable shell fabrics and membranes. There's tons of info on the web, but it's all over the map. Gonna run through a few of them here and what I've found and hopefully some fabric expert can chime in and give us some streamlined info.
Gore Tex Pro (not to be confused with the Pro Shell it replaced): Seems like a very good fabric choice for pants or bibs. It apparently comes up short on breathability compared to the air-permeable membranes (eVent, Dry.Q Elite, Neoshell, etc.) though. Since I need a very breathable jacket, so I'm leaning away from Gore for the jacket. Which leads me to:
eVent/Dry.Q Elite: These air permeables supposedly have better breathability than Gore and would seemingly be better options for a jacket. However, the breathability comes from not having a PU coating on the membrane. Gore traditionally used the PU to protect its ePTFE membrane. So eVent/Dry.Q is in essence "unprotected" (at least by PU). There used to be reports that eVent used to have problems with the membrane delaminating, possibly as a result of being "unprotected." Is this still true? If not, and these fabrics are just as durable as Gore Pro, what's the downside, even for use as fabric for the pants? I can live with them being slightly less than 100% windproof, if that's the only downside.
Neoshell: Would seem this might have similar problems to the eVent/Dry.Q as it also does not have the PU coating. Also, I have read where its waterproof rating starts out at only 10,000. Polartec says "waterproof is waterproof," but 10,000 is not enough for truly wet conditions. Definitely not for pants, and for me not even for a jacket. I already have a nice Patagonia hybrid softshell that works great for all but the wettest days. I want a waterproof that is always waterproof, not just Colorado or Utah waterproof. Even worse, there is a some hard to find text in one of Polartec's documents that says the waterproofing gets reduced to only 5,000 after a number of washings. Pfffft. That doesn't cut if for me, even as a jacket. One question: Does eVent/Dry.Q also suffer from this type of deterioration in waterproofing after washing?
Dermizax NX: The waterproof/breathability rating (20,000/40,000) for this stuff sounds nuts, but there's hardly any info on it on the web. Hard to trust waterproof/breathability ratings from the manufacturers anyway, so some more info would help. There's some guy making hunting clothes out of it (http://blog.kuiu.com/2013/05/28/dermizax-nx-the-worlds-most-breathable-membrane/#sthash.QPIbUe5h.dpbs and http://blog.kuiu.com/2013/05/30/the-worlds-most-breathable-product-line/#sthash.hkHT4ILp.dpbs). Bergans of Norway has it in a bunch of jackets. Kjus and I think Killy use it or used to use it in a few pieces. MEC has used it in at least one jacket I found. Other than that there's just a lot of weird websites that mention it. Most of them are from Europe, some needing Google translate. What gives with this stuff?