For what it's worth, I've been told by several that if you've done a clean install of XP, and your system is working fine it's best not to make any upgrades to drivers. The time to upgrade drivers, or so I'm told, is when things are not working fine and a driver is the suspected problem.
Also, before any upgrade you would be well advised to backup your system with Norton Ghost or a similar utility so if things go south, you can restore your system to a point before the upgrade.