Yes, what you said. When it comes to managing servers, be afraid. Be very afraid. The volume of tasks and the complexity is startling. I expect that much can be done through an admmin panel these days, but definitely put some focus on the admin and support.
Who is doing backups? Do you have failover mail servers? Security updates to the os? Etc.
I'm sure there are good solutions out there. I cant give specific solutions because I manage my own at the command prompt - not recommended.