Best cooling electric fan

You just have to put together a system that meets the requirements of your application, and that can be harder than just spending a bunch of money.
Very true. Unfortunately, who is going to help you put that system together for your car? A lot of people are more eager to sell you a system that will bring them in a nice high profit margin than a system that will really work well. That is what happened to me. I bought a Griffin Aluminum radiator with their custom-made shroud and electric fan system. Guaranteed to handle 600 HP. It didn't. I tried everything, but I wound up trashing everything except the radiator. The radiator itself worked pretty well when paired with a factory fan shroud, fan blade, etc.