I just got a great deal on a Mac Pro and want to use my Dell 3007 WF-PHC 30" monitor. The Mac only has an HDMI port so I tried a Dual Link DVI-D to HDMI cable and still cannot get better than 1280x800 resolution. I would welcome any recommendations so that I can get the intended resolution out of the monitor (and I do not feel like I'm in preschool). 