so don't worry - we welcome Mac questions as well.
Your son has a superb computer, and Apple OS looks very good on the screen, so that has something to do with it. Apple displays are known for quality, so that also has a bearing.
Your Syncmaster is also a good display, and if it isn't looking as good as you had hoped there may be a hardware reason. Does your computer have an onboard graphics chip - one that is on the motherboard - or does it have a PCI graphics card?
Have you adjusted the screen's settings since you got it?