Hi Digitell,
Sorry to confuse you -  I didn't notice the four USBs on the main board.
I think you have chosen a fabulous PC, one I would love to have.

I have heard suggestions that XP Home does not support multi-core CPUs,
(ie. it will only use one of the cores), so that you cannot get maximum H/W performance,
BUT that XP Pro does.

Steven, do you know if XP Home / Pro and/or Vista fully support multi-core CPUs?

Also, if you buy XP Home or Pro, check with the vendor if you are getting one of those "free Vista upgrade" licences that Microsoft is giving out.