Why should we upgrade to XP Pro?

I am a software developer that has been forced into a system administration role. I have no training or experience in this capacity. Currently our company has about 40 workstations, only 6 of which are running XP Pro. My boss is convinced that if we've gone this long, we can slowly upgrade to XP Pro. There is no reason to move existing workstations to XP pro, as long as we order all new computers with XP Pro. I can give him the standard central administration, security, etc answers as to why its better, but he doesnt think those justify the cost. I also tried to explain that all the computers with XP Home have to be managed individually. We don't know who has antivirus and who doesn't. We don't know who has run updates, who hasn't. He's willing to accept that and/or thinks we should be able to manage that stuff per computer. Can you provide any other reasons for upgrading? Some possible issues that XP Pro could prevent (or be fixed easily with Pro) that would be a huge disaster on home

Why should we upgrade to XP Pro?

Almost the only thing XP pro gives you over XP home is better networking %26 managability. It's the same core code, so the same sort of things that affect one version will affect the other. Oh, and it's a bit better at being used by many different accounts.

As to why to upgrade?

Because of the ease of management should be enough for him. Does he want to hire a new 'you' as well as you?