We're about to move into a new house which is spread over four floors. I intend to use the top floor as an office and want to have an iMac up there. So my question is - is it possible to have the iMac (and a Drobo or similar) store all my music and videos and have that 'broadcast' all the way down to my Apple TV in the lounge three floors down (my Apple TV sometimes has issues receiving from my Airport Extreme that is currently sitting just a few feet away)? Will it work if myself and my partner get rid of our MacBook Pros and just have iPads? Can the iPad somehow 'slave' off an iMac on a wifi network?