Just one last question about my paper backup (noob) - do I need to create a new backup after transactions, or is the initial backup good for life?
It's in theory good for life - but you need to make sure when you make a transaction from a paper wallet address that the change is returned back to the paper wallet - if you're not careful it will be returned to an address you were not expecting.
This is very much easier to manage if you use blockchain.info wallet for the TX rather than the BTC client one, not sure how easy Armoury wallet makes this as haven't tried yet.