I think this the wrong place to ask...

But anyways, please note that memory (RAM) is everything. Apps will be bigger in the future, so please consider spending some money on at least 256MB of any sort of RAM that fits on your motherboard, 512MB is even better. More than that is (still) not really needed.

And second, celerons are fine for most things except upcomming 3D games. But well that is a moving target, and then you will also 'need' a good 3D card. I now have an Epia 800 running here, and it does office stuff and webbrowsing just fine. The processor is equivalent to a PII-250/300, it has 256MB of RAM. Go figure. I can even login with multiple users and it use still usable.