Air cooling is sufficient to cool most consumer processors these days. Make sure to get a good cooler though. I remember Thermalright's Peerless Assassin being well reviewed, but there may be even better (reasonably priced) options these days.

If you don't care about price, Noctua's air coolers are overkill but expensive, or an AIO could be an option too.

AIOs have the benefit of moving heat directly to your fans via fluid instead of heating up the case interior, but that usually doesn't matter that much, especially outside of intense gaming.

I was thinking a good air cooler, I don't like AIO!