Semi-drysuit is my choice. I call it that because my suit has a neoprene neck gasket as opposed to the rubber neck gasket. These suits are not made of Goretex, but I've had no problems with breathability. The cost is significantly less, as well. Ingress of water hasn't been an issue when wearing a pfd while doing self rescue practice. In fact, I've taken dives off of my Adventure and felt no leaking. Just keep in mind that good layering is important as the drysuit has no insulation value at all. I wear a layer of polypro under a layer of mysterioso when I'm out and it's really cold. Over-heating isn't too much of an issue as I just wet may feet and hands and I cool off quickly. Sweat is carried away by the wicking action of the two underlayers. Worst thing is I get a little stinky, especially if I've been eating too much garlic
