Many IT departments are faced with making some key investment decisions around their IT infrastructure. If you simply replace your aging servers, you will not be addressing the issues around DR, back up and redundancy.
Key Server Consolidation benefits...

Reasons for server consolidation vary from network to network, but common themes emerge. Changing a network requires moving and combining files, data and other network resources. Every inherited network becomes a candidate for consolidation, whether the IT manager moves into an existing network, or merges a new network into a once-orderly and well-planned installation.