Hi Guys I have an old Plasma 42 inch tv that has HDMI, I don;t have apple tv but would like to connect my imac to the tv to work on Logic and have a bigger image of the work space....the Panasonic Plasma tv is from 2008, the only connection I think it has is HDMI...is that my only choice?....I would need an extra long HDMI cable too..what is the longest HDMI cable available?