Even with the 64 bit XP you are moving to a version that is rare to find all the drivers and help apps for. You know what you are doing and will accept that issue.

About better. I never found such a move to run better. Apps for the most part still are limited to 2GB RAM each just like before.

As to the SATA drivers, doesn't your BIOS do the old IDE emulation to avoid that? And such a driver would be from the machine's maker or the motherboard maker. It concerns me that you ask such because support is going to be non-existent. That is, you're going to get a little lonely.