OK. Here is the scenario. I don't do a lot of computer gaming which is why i bought the macbook (as well as wanting something more compact), not the pro. But now I'm thinking i want an Xbox 360. If i bought an xbox360 and a 23inch ACD, would I be able to run the 360 on the ACD at a High Definition resolution. I really want HD gaming! Also, would there be a good way to have my macbook and 360 simultaneously connected and just change which input is used? Thanks! Am i right in thinking that the 20inch ACD isn't HD?