My monitor is the Dell 2709W and I have my Xbox360 connected via HDMI. I don't know what it is, but some games suffer from some very bad jaggies. Devil May Cry 4 looks smooth, but games like Mortal Combat vs. DC and GOW2 all have mad jaggies, some vsync issues, and just doesn't look that great. When I have the Xbox plugged into my plasma, I have no such issues. Is there some settings that I need to look at in the Xbox360 preferences?