One of my favorite masks is the Scubapro wide view mask you see in my avitar, but you cannot get it now. I really liked the black one, but I've now gone through four of these, as they literally melted off my face. The one in my avitar currently is a combination from a black mask without the purge to the silicone one with a purge (I used the neoprene mask's lens on the silicone mask).
What some people don't realize is that theclear or white silicone was developed for Underwater photographers to put on their model, so that their faces showed well in the photos. They then caught on, and everyone's began using them. The problem is that in limited visibility water, there is an internal reflection that can really inhibit seeing things in the water in front or below you. But, silicone does age very well, and masks 20+ years old will still be reliable.
So far as the high volume, this is a definite advantage in very cold water.
SeaRat