So im going to be buying the new 2012 Imac when it comes out (whenever that is), but i was wondering, if i buy a 5.1 Headset such as a Siberia V2, or any gaming headset that supports 5.1, will i be able to use it with my imac, do the current imacs have a 5.1 sound card? or whatever it is? will i be able to get the full experience? thanks.