My goal was to build very quiet and reliable PC with noise slightly above ambient level and still powerful enough. I chose reliable components which meet my requirements so the software I use will run without any problems. Mostly I use this pc for java/web programming and as media storage. This PC doesn't have any graphics card because I don't launch any heavy games on it. It has Raid0 2x128 (backed up to HDD timely), stock CPU cooler, quiet fanless PSU and reliable UPS. I chose Ubuntu as OS because it's easy to use, free, no malware and I can still launch many windows programs under Wine.