Windows is a bloated beast of a system that Microsoft has no intension of fixing because they make way to much on service and support to corporations.
Go Build a Dell and a Mac (the dual Quad core Mac pro, thats eight core's) then build a dell of equal
performance and then say it's way more expensive! Or for that matter a regular intel core duo and tell me which one looks cooler also and is more streamlined. Also keep in mind that the Mac comes with wireless and bluetooth 2.0.