if you have strong PGP keys non of your correspondents will be able to use them. People who on MAC and Windows PGP (GPG) frontends will not be able to use any good public key. So, what you going to do? You are going to give them weak key.

for now PGP with good key too costly to break, also 3DES still OK with long pass.

voting for AES was influenced toward Rijandel so use of AES256 maybe not a good idea.