PGP server v Hosted Exchange

We currently offer PGP desktop to about 6 of our workstations, but want to roll this out across the company (25 or so WS). We are about to move our exhange server to a hosted solution and virtulise our servers.

Would the PGP Server product be more efficient (oughtright cost/admin overhead) than individual workstation instalations?

We use win7 desktop enviromnents with Outllook 2010 and the current AD server is SBS2011

Thanks for any input

PS Admin may want to move this to a different topic area