BIG Turbo build planned - turbo guys!

I agree, you can get additional power, by raising the boost pressure, instead of going larger valves, and port/bowl work. However this does create some other issues. Increase boost pressure and the charge temp increases, and density ratio, decreases. Depending on the turbo, you can wind up outside of the best efficency island of the map. Look at it this way. If you have a 1/2 inch hose, and 30 lbs water pressure, and compare that to a 3/4 inch hose, and 30 psi water pressure, the 3/4 hose will flow more volume of water. The same holds true for an engine, whether boosted or not, reduce inlet restriction, power goes up. Reduce exhaust restriction, power goes up. And with a turbo, as you increase boost pressure (with the same turbo) exhaust back pressure also goes up. Of course there is a point of deminishing returns, but adding larger valves, and pocket porting, I would say is worth the money.