My Mac Pro arrives this Friday 10-13 . I am going to need additional USB ports on the back. I know I can use a powered hub but I want a clean look and am opting for a PCI express card. I have scoured the web looking for such a card and it looks like only a handful of cards are available. Belkin makes one and that is the one I am thinking of purchasing. http://catalog.belkin.com/IWCatProductPage.process?Product_Id=278295 Does anyone have any experience with such a card? Or can anyone make a recommendation?