I've never needed one. Your stock fan is fine. If you want less drag, upgrade to a factory clutch fan. Properly upgrading a vehicle that didn't have a factory electric fan to an electric fan really isn't worth the hassle unless you are racing or bored. To do it right, you need to make sure your alternator puts out enough amps to power it, you have to wire in a temp sensor and a relay, and you have to mount it. If you are building something totally custom, go for it. But for a daily driver? I say get a factory clutch fan and call it good.
