I'm upgrading out server @ work and I just wanted to check with you guys on something, We have about 15-20 users, and are going to be using it mainly as a file server, now contact/uptodate server, and iTunes server, and possibly in the future light FTP use. The single 2ghz with a gig of ram should be more than enough for my needs correct? I would like the dual but I think for the cost it's probably overkill in my situation. Although we seem to be expanding lately (more users) so I need to it keep up. Thoughts?