I'm all about considering alternatives when it comes time to replace my MacPro, but HP probably isn't going to be one of them. A colleague ordered a couple of attractively priced HP pre-built systems (not the 'workstations' though) within the last year and the ordering and fulfillment process was as byzantine as you would expect from HP. What advantage does HP have over any other prebuilt PC system? (Perhaps the awesome website for downloading drivers...)