I bought a 24" iMac to replace my 18 month old Macbook Pro. It's nice and everything but it doesn't want to cooperate with my Matrox DualHead2Go and I'm wondering if anyone might know why. When I had it attached to the DVI port of the MBP I was able to use the MBP display and two external monitors, each set to 1680x1050. When I attach it to the iMac, it works but the best it will do is less...like each set to 1280x960 or so. Is the video card in the MBP really more capable or is it because the iMac has a much larger screen or is it something else I'm missing?