I'm an intermediate Production DBA and busy writing a business case to upgrade from SQL Server 2005 to 2008, but struggle to find any 2008 features that makes upgrading to SQL Server 2008 a MUST. Yes, there are many "nice to have" features but none of them are MUSTS with the exception of (1)Maintaining Mainstream Support. I want to know about features that can justify the business costs and effort(time) for upgrading to 2008. I'm more interested in PRACTICAL features that can improve (1)DBA productivity and efficiency (manageability), (2) environment security, (3) increased performance , (4)increased availability, (5)standardization and (6)documentation. Can you help to list some of the features which you think are MUSTS for now. The details about how each feature works and how to practically implement it will follow at a later stage. Your assistance will be highly appreciated.