If you can get your old system online, and use the account management settings to deactivate the system before going to a new one, that would be absolutely best.
A few things come up when doing a back-up on one system and restoring on another, that don't happen when restoring to the same system.
On the same system, everything gets restored. But moving to a new system some copy restricted data will not. In some cases you can re-download the copy restricted data and it will function on the new system, as long as you've not reached your limit for simultaneously active systems. You can only deactivate a system from within the XMB interface, which sucks when the machine completely dies. But as long as you have network access you can do it. Speaking of, if the network is functioning, there's a option to transfer all the data from one machine to another using their gigabit interfaces (just plug on right into the other), without having to back up to a disk, and then read from the disk (it cuts the time in half at least).
