Im looking to get a time capsule but am curious on which storage solution to get. The 500GB or the 1TB. Currently the only computer to be backed up on the Time Capsule would be our MBP. However my wife has alluded to the idea that she may want an Air at some point. Would the 500GB be able to backup our info if we had two computers? Also can you partition the hard drive on the Time Capsule to have hard drive space that won't be taken up by Time Machine backups? P.S. I don't plan on filling up the 320GB hard drive on the MBP and I dont have a lot of media but the wife has a good amount of songs.