The NSA can definitely crack 128/256-bit PGP; I don't know about AES since it's pretty new. I would upgrade to RSA with 1024 or 2048-bit keys and keep the AES also. For extra security, if you don't want to upgrade an of your algorithms, you could encrypt the files multiple times-- encrypt it once with one key, then encrypt a second time with another key, et cetera-- this is the equivalent of using very large keys. Using AES to encrypt the same file eight different times is the equivalent of using a 1024-bit key. You could also develop software that does this for you for a given number of iterations.
That's how 3DES gets its security. DES has 56-bit keys and you can crack it in no time on a fast enough computer, but 3DES has the equivalent of 168-bit keys and is much more secure.