This is probably a very basic question, but I want to use a second monitor (my digital t.v. which has all sorts of video [DVI] inputs) for my existing iMac in another room. The idea is to play our movies and slideshows on the big T.V. How would I make this happen? Is there a mini-DVI output already on the iMac that would go to a DVI input on my t.v.? What is the best way to do this?