Does this sound like a safe strategy?
> anyone see any flaws or potential problems?
what if your computer is already compromised, say -- with spyware that performs keylogging?
or perhaps assuming your system if fine now and your savings wallet is secure, how long before you need to use that encryption key so that you can spend from the savings wallet? will your computer be secure then?
it all boils down to how much you trust that your computer isn't compromised. read this before asserting your confidence: http://blogs.computerworld.com/18387/why_the_bad_guys_are_winning
for savings wallets of larger amounts, an offline wallet solution seems to be the only prudent method: http://en.bitcoin.it/wiki/How_to_set_up_a_secure_offline_savings_wallet