I absolutely love Paramo rainwear. It is by far the most breathable and versatile rainwear I've ever worn and deals with rain and moisture in a completely different way from other systems, and its "directional fabric" often confuses those who haven't used it before. There is no barrier layer to keep rain out; it works by beading water on the surface like DWR finishes and on the inside by extremely efficient wicking system that works the same way that animal fur works. The garments have to be periodically washed in the Nikwax solution to keep up the waterproofness, but as laminate garments require washing, too, this is no problem. I didn't believe that the Paramo system would really work when I first bought it, but countless days out in heavy rains here in very humid Japan, when other systems always left me drenched in sweat, but the Paramo system always left me dry. Others have complained of Paramo jackets being too warm, but I either wear the jacket with only a t-shirt underneath, or else it is too warm outside to be wearing a rain jacket in the first place, and in that case I let myself get drenched in rain and put on the Paramo jacket at the end of the walk to induce its wicking properties and dry out my shirt. My only two complaints about Paramo garments is that they are rather heavy and, for me at least, and similar to my Superfly eVent jacket, they don't do well in keeping out cold drafts when the temperature drops. For UL enthusiasts the weight might be a problem, though with the wicking liner inside I compare the jacket to a thin thermal layer underneath that helps prevents the chill of cold rain from getting to the skin. With these jackets you don't need a windshirt, though you will need an insulated layer for colder temps. For me I nearly always end up taking my Paramo Cascada, rather than my Superfly, even though it is heavier. The longer length helps keep my waist area dry. I am thinking of purchasing the Paramo Cascada trousers, too, but have reservations about the tendency of the fabric to wet through when pressure is applied, so that sitting down in the pants would tend to make my bum wet.
To answer your questions about pushing through wet brush, Jon, I personally haven't been bothered by that, even when pushing through some really thick rhododendron and bamboo grass patches in the mountains. The wicking liner always keeps me warm enough even when I feel the water, and after a few minutes of activity the wicking always dries away the moisture.
I heartily recommend Paramo products and wish they were better known in the States and here in Japan.