If you want something quiet, you need to go with a large fan. Small fans = noisy.
Both Zalman and Thermalright make some of the best coolers on the market...
http://www.thermalright.com/http://www.zalmanusa.com/I personally have a Zalman 7000AlCu and two Thermalright XP-120 coolers.
Many of the Zalman models come with a fan controller module that allows you to adjust the fan speed so that you can balance noise vs cooling power.
The Thermalright coolers take standard fans so you can do some research and purchase the quietest fans you can find.
Silent PC Review has a lot of good info about quiet PC components including fans and heatsinks as well as other components...
http://www.silentpcreview.com/section5.htmlThe biggest problem you will likely encounter is height restrictions with your bookshelf case. I have a really small micro-atx case and the Zalman 7000 just barely fits. There's no way in hell the XP-120 would fit due to the height of the fan.
If your case uses a micro-atx sized power supply, check out the Seasonic SS-300SFD...
http://www.seasonicusa.com/sfx.htmI put one in my case and the difference was unbelievable. The stock power supply was so loud, I couldn't hear anything else. After I got the Seasonic, I could hear my hard drive, and video card fan. I replaced my hd with one of the ones recommended by Silent PC review and I swapped out my Geforce4 for a fanless Geforce 6200.