Excuse me if this is common knowledge! I want stream movies from my imac to my HD Sony Bravia TV. The imac is upstairs, the TV downstairs. Have tried the cabling method, just a complete faff! Have looked at the Apple TV option, but amongst all the ad stuff, can't work out whether it will actually stream anything I want, or just stuff purchased through itunes. I want to be able to completely mirror whatever I'm showing on my imac to the tv - including sound - and to get the movies from any website I choose. Will it do this? Thanks.