Xbox 360 on iMac monitor

[xJus10x]

i'm sure this has been asked before, but i couldn't find anything. what do i have to buy to play my xbox 360 on my imac monitor, i have a core duo imac

[7on]

http://elgato.com/index.php?file=products_eyetv250

This looks like the best option. No HD connection though, I'm just guessing that'd put too much strain over USB2.0...