Hello team! I am looking for some advice regarding whether I should by the new Airport Time Capsule in 2TB or 3TB. The situation: Currently in my house hold we have 4 MacBook Pros, the newest MacBook Air, 3 iPad minis, 1 iPad 3, 3 iPhone 5s, 2 iPhone 4S, 2 Apple TV's, 1 airport express the newest one and 1 airport express the first gen that plugs in the wall. I am looking for a new router and since I am at it might as well get a time capsule to back up our computers. Only 3 computers will need to be backed up. One of the MBP's and the MBA will be coming and going between a brother of mine being in the military and the other in college, so we won't need to back them up. I want to keep the first gen airport express as I am using it now which is set up with some Bose speakers that I use for airplay and it is also connected to a printer. So questions: 1.Price is not really an issue, Would 2TB be enough or should I get the 3TB option? The MBPs that will be staying at home have HDD sizes of 320GB, 750GB and 500GB. 2. Can the time capsule back up the 3 computers with hardly any work after the initial set up? 3. Our house is roughly about 2900 square feet split in 2 floors. Would the new airport time capsule be enough to span over the whole house? If its not can I just put the Airport Extreme somewhere upstairs and make it extend the network? If I won't have to do that what would be a better use of the airport express? Thank you so much for your help!