I'm planning top get a Time Capsule, so I could get faster network with more range, in addition to built-in backups. But I still need a network-attached storage, and I would like to do that by simply plugging in an external HD to the Time Capsule. Now, USB would be an obvious choice. But for roughly the same amount of money I could get a external HD that has gigabit ethernet. Now, Gig-E should be faster than USB, so would it make sense to go that route, as opposed to simply getting a USB-HD? I trust that functionally there shouldn't be any differences between US and ethernet?