Symantec Ghost Suite licensing - question

Hello,

If I know already more about Backup Exec licensing, I have no idea which licenses of Symantec Ghost Suite should I choose to protect 1 server and about 25 PCs. I see:

1. Ghost Solution Suite

2. Ghost Solution Suite Var

3. Ghost Solution Suite Server

4. Ghost Solution Suite Server Var

And what is the difference between Var and srandard license in practise for me?

Best regards!