The monitor for my G5 PowerMac (bought 2006) has died and I need to replace it. My local Mac dealership tells me that the graphics cards have changed (did I get that right?) and so I need to source a DVI monitor myself. They told me Samsung was good. I've found a few on the net, but I notice that a couple of customer reviews say that the monitors weren't compatible with their Macs. Can anyone recommend something compatible? Looking for 20" minimum and I don't need full DTP quality, just something easy to set up and use. Thanks.