It depends on what you're looking for. If you only need a few web sites, an AMD Duron 1.8, AMD Athlon 2000, or Intel Celeron 2.0 is fine. If you're going to be putting a lot more sites on there, you may consider an AMD Sempron 2400 or higher, or even the 3000+ or higher. (If you want Intel you could try the P4 2.4 or even Xeon 2.0 or higher). 512 MB RAM is the minimum, 1 GB is reccomended (again depending on the number of sites). Take a look at the dedicated and colo hosting offers for a view of some providers and their offers. Best of luck.