I've been trying cotton based fabrics with ENCAPSIL technology. This is old stuff but essentially each individual fibre is silicon coated. Ultimately the coating will fail, so durablity is questionable. So far I've been quite impressed BUT they aren't as breathable as I expected.
Nor is cotton ventile. I have a cotton ventile shirt I wear on some windy days instead of a windproof. It certainly keeps the wind off but you can see where I sweat, under the arms and under the shoulder straps of my rucksack, once I've been moving for a while. So maybe there is no perfect solution yet.
You scored two home runs IMO. Rab & eVent. I have a Rab Bergens jacket that worked very well the first few times I wore it BUT it did start to get damp and clammy underneath it after about an hour and a half of walking. Then on a day in fairly persistent rain I got absolutely soaked wearing it. I suspect the humidity gradient meant that it wasn't working very well.
I have a Neoshell jacket by another manufacturer that I have worn all day and that's been the most breathable I've worn so far getting only very slightly clammy at one point.
Rab get mxed reviews. Their stuff is very well designd but I hear of quite a few failures of their kit on this web site. I think their quality control is not what it should be and I have heard of fabric failures in their garments.
So I think you lucked out all round. Sorry to hear of your misfortune.