Max out your PC's CPU

I realize that you have limited space, but probably the only systems that require upgrading for general computing are over 1.5 years old. That is the point where the 500MHz systems were the sweet spot in price/performance. It is also the spot at which buying a faster system hit a point of diminishing returns, unless you needed to burn CD's or do a lot of graphics work. My point is, if one is to upgrade, I find it curious that you picked newer technology as your focal point. If you needed anupgrade, why would you select either a Celeron or a Duron as an option? These boxes have severe limits on graphics capability. I believe if this is for corporate use, replacing the box makes more sense. If it is for personal use, the system should last at least four years, like my 350MHz PII. My big limitation at home is lack of broadband availability. I can't use a faster machine without it.