Reconfiguring xorg, gdm whatever should not be an issue. As a matter of fact MAC is a unix based system anyway and that works.
I know I can tweak x11 loading certain kernel modules and am probably going to get better than windows users ever will, because windows just does not have that control available to you.
Might I add, today I have been asked to beta test windows 7x which is Vista, without the bloat due to be released September 2009 by Microsoft. I shall make another thread about it after I have everything working.
Regards,
flecktarn