It depends on your use case tbh.
Yes PGP portable is EOL, and SEE-RME is the recommended way forward. It is however, possible to upgrade a PGP WDE client to SEE-FDE (http://www.symantec.com/docs/DOC9279), so it's possible to migrate fully to SEE and drop PGP entirely, if all you're using is disk and usb encryption.
Unfortunately, at this time, if you want to have mail client and/or fileshare encrpytion with removable media encryption, you do have to run both solutions.