Over at Tom"s Hardware, they have done a neat article on running Vista on a budget PC. Can it? and do you want to? Here"s a short blurb from the article:
"Our first article about configuring AMD and Intel PCs within a budget of £200 / €350 made it clear that systems in this price range are suitable for everyday computing tasks. We equipped our Celeron and Sempron test systems with a fast and affordable 160-GB hard drive and one gigabyte of RAM, and the systems did a great job in Windows XP. But how do they perform with Windows Vista? And do you really know how your PC would perform with Vista?
Microsoft has created two certification logos to help customers choose the right components for their Windows Vista PC. There is "Vista Ready" and "Vista Premium Ready." If all of your components carry one of the logos, you should be able to at least run Vista properly; if you purchase high-end products you should be ready for the Premium and Ultimate editions as well. However, many products, especially older ones, do not carry any logo to indicate Vista readiness. The reason for purchasing hardware usually isn"t a particular operating system, but an application or specific requirement such as more storage capacity, more RAM or a faster platform. We normally assume that the latest OS will work on hardware that we"re going to buy from retail."