I really like that oil cooler idea. But if i were to not do that, i think i would just keep the hood scoop to help air out the engine bay. i dont know how much a "ram-air" setup would help you. The air is already being "rammed" by the turbo, that the supposive "ram air" intake would probably do nothing. Its true that you might get some cooler air, but with a turbo spinning at 40,000+ RPM, that air is going to get extrememly hot anyways and have to get cooled by the front mount.
Just my opinion, not to sure on it, but i always heard that ram air plus turbo = retarded.