Bio-Wheel
I have an Eclipse System, so the bio-wheel was built into it. Of course, I've never had any experience with anything else, but it works great for me. If the water level is high enough, the wheel makes virtually no noise. And no, it hardly ever needs cleaning. In fact, you're not supposed to touch it unless it get completely jammed, which has never happened to me.
The wheel works great for me, and has so far been zero maintenance. But of course, I've never known anything else. But when it comes time to get a bigger tank, I will definitely be including another one.