I personally would not use an untested O/S on a new-build for obvious reasons, if something goes wrong you will have a nightmare trying to track it down. I have seen copies of XP on Ebay going for £35, you would be better off using one of them for a few months to be sure you have all the correct drivers installed and it is running sweet before trying out a new O/S. It would be a simlple matter to make a backup so that you could revert back to it in the event of a catastrophe. Try using two hard drives (one for each O/S) and swap them round to see which one is best.
Just my opinion of course.