So I am going to mount my 20" iMac in my Kitchen. What I am wondering is... how do I get TV on it? I have a cable in the wall where it's going to go, is there some kind of adapter? I have an extra HD Box in the basement that isn't used, am I able to stream content to Apple TV then to my computer? Even if I only got basic cable I would be happy, there is a TV in the spot now that gets basic cable so I just want to switch it out. Also I know there is a VESA adapter from imacmount, is this the only company that makes them? I am going to put it on an arm so I am not worried about it being flush against the wall or removing the stand.