Since XP predates SATA, you'll run into the F6 disk issue unless you slipstream drivers onto the CD.
Some people are allergic to using CD-Rs and drives. If you are, be aware there will be hoops to jump through and third party tools needed to install from USB drives, since no one did that before the netbook craze at which point installing from USB caught on virtually overnight, at which point XP development was long frozen.
USB 3.0 is a problematic area too.
You could also look into AMD (Socket AM3+) if you're feeling that for some reason. The last of the line FX CPUs for that socket are comparable to Sandy Bridge if I remember right, and performance per watt is quite poor. But, some of those boards might have official XP support or even onboard floppy, like the ASRock 980DE3/U3S3 I have.