I have a Mac Pro that I bought in early 2007 that is still going strong. If not for that pretty 27" iMac that was announced last week I would not have pulled the plug and bought a replacement for what I have now. The 27" for the moment offers me a lot of advantages over my Mac Pro. .....but then I got to thinking. The audio. What about the audio? My Mac Pro has digital output. I have toslink digital cable running from it to a really expensive Logitech 5.1 system. The audio quality I get, particularly with 5.1 content is AMAZING! Logitech Z-5500 Speaker System But what about the iMac? All it has is a dinky mini plug on the back to handle its audio. Can anyone tell me if I should expect the same quality sound coming out of that computer to my speaker system? Seems that I have to now deal with analog input. Can analog input decode 5.1 sound? I don't even see an analog input on this speaker system though the specs say there is one. Perhaps they revised the speakers since I bought it years ago. I am just a little worried about the huge step down in audio capability here. You have this top-of-the-line iMac designed for watching HD content but it doesn't seem that you can output digital audio.