Pete,
Symantec Endpoint Encryption is the wrong choice.... this is the SEE product is going EOS this year.
Symantec Encryption powered by PGP is the new branding of PGP, is incorporates all the best of PGP and rumor is there is a path for removable mendia coming also since PGP portable is dead.
SEE runs on a windows server with IIS and sql DB, PGP is a soft appliance you build in vmware or use the approved hardware list.