nutball has again hit it on the head. define "quiet" (in this site, by silent, we mean absolute dead silent, which is pretty much an utopia, and yes, we do take words seriously)
How quiet is quiet for you? Will you be sleeping in the same room with it? Or do you just want to be able to concentrate without a vacuum-cleaner noise in the background? How quiet is your average work environment? Are there any people moving around, talking, shuffling? Or do you work alone, without any music on, away from cars, etc, no dogs barking?
Your answer to above questions is the only thing that'll get you some other answer than "start reading"
Really, it's good for you.
I know we're being a little cruel but answers to such questions have been given ad infinitum and we'd all be much happier to help you when you've hit a wall (and you will) rather than walk you on the runway. Once you actually start your build, you'll find the folks here infinitely more helpful than most other sites on the net.
Another important factor to consider before starting your planning is what's your average ambient temperature? Quieting your PC means your components will run a little hotter than the average overclocker geek so your surrounding environment is important.
My advice: define quiet, measure ambient temps, read the recommended sections, start drawing up a list of components, then list them here, along with your reasons for choosing them. We'll be able to help you better then.