I'm looking for a way to use my iMac as a monitor, preferably for a PS3 or an Xbox 360. I know that this model doesn't have any native pass through capability so I was wondering if anyone could recommend any kind of USB video input card or a capture card which would allow DHCP HDMI in without too much lag. I have really limited space and don't have room for my iMac and a TV. It's always seemed a bit of a waste really to have such a nice screen and not be able to do much with it externally. I've tried a google and forum search but a lot of results talk about video capture etc which isn't really what I'm specifically looking for. Thanks.