We're buying a 42 plasma for our new office, and aside from cable, dvds, I want to give presentations from an apple power book. They won;t be HD video, more like powerpoint, but I understand that the higher res of my power poor, somthing like 1024 x 760, is better suited for HD, even if it is simple graphics. True? Also, do I need to make sure it has a DVI input or will HDMI be my only option? S video is lower, right?