Primarily I am looking for quiet
A good 1200 RPM fan e.g. a Scythe, Noctua, or the like should do the trick -- pair it with an undervolting option and adjust to desired noise/airflow. If going the PWM route, ensure you're getting a fan that's kosher with that control route. 1200rpm should be plenty fast for most anything you may ever desire and a good choice will quiet down very nicely at lower rpms.
synthtel2's post should help you learn a bit about design i.e. what blade design is more appropriate for restrictive e.g. heatsink vs unrestrictive e.g. case fan.
Not sure what the community is like nowadays, but you could glean a lot of good insight even from old posts at SPCR.
Edit: Since you are a new poster, I'll get specific and say I'm still rocking a Scythe Slipstream 1200rpm at 6v. I've never bothered to look into the Noctua options simply due to having been able to reach ambient with noticeably cheaper undervolted Slipstreams. If you ever get into quite computing in more than a cursory manner, I'd again recommend SPCR to you if only for additional reading.
Edit2: Make sure you are focusing on what's actually making the most noise. A paper towel tube held up to the ear can be used to help distinguish between noise sources (or simply just start unplugging things...). Don't be surprised if your video card seems to sound like a vacuum cleaner once you get squared away with a good case fan setup, for example.