If you are planning on a machine that requires updating from the internet every day, not only on your O/S but on virus detectors, Antispam, firewall and worst of all service packs go for XPhome. The problem is that once you start the machine gets slower. I have just setup a machine for my daughter with a newly installed Windows XP Home OEM from OCUK. The SP2 version installed correctly and I found it work faster and more efficiently than my own installed SP1 install of XP PRO updated with Sp2 seperately. My P4 3.2ghz machine takes 6 minutes 14 seconds to boot fully into windows device drivers and background applications and firewalls in place. I like to call it WINDOZE.