Which monitoring items to show to management?

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http://serverfault.com – My management asks for a monitoring screen to be displayed inside a hallway. They think about those fancy screenshots salesmen show when they try to sell this wonderfull appliance which never breaks down (never, promise). Or the kind of thing we see when visiting Nagio or Cacti website (I shown some, they said yes). My management knows nearly nothing about what computing people are doing. They want this to have some professional feelings about network, servers, etc. And probably to be seen as professionnal themselves. We have : 3 servers (1 fileserver, 2 applications servers) 1 backup serv (HowTos)