Some more head questions

The reason I bought the valves was only a little bit about size. I liked= that they are high quality, stainless valves. I know that .080 is not a dramatic improvement in size, but frankly, what is the difference between a 1.88 valve and a 1.92 valve? Only .040, yet guys will go out of their way to get 1.92 heads. The bigger issue is porting, since that seems to always be the bottle neck. Since I am using a blower, .080 in valve size means even less. But every little bit helps. I plan on doing my blower head by porting and using the Engnbldr valves and 340 springs, but not milling. I can always mill later if I decide to go Au Naturale'.