Some points to consider
Is your valuable Data scattered around multiple PC's ? Is your valuable Data safe and secure ?
Do you have Mac's that you'd like to connect to windows servers so you can share data with PC users ?
Do you have smart phones and ipads which could be used better to collect email and edit mailbox's, to remote access your desktop computers and servers.
Do you have the right kind of backups in place ? Not all backups are equal !
Hard drive failures are very unpredictable. Drives can last from 1 day to many years with countless examples in between. Data Backup is vital if your business relies on this data to operate. Not only data backups but system backups and a strategy for disaster recovery should a server or data store fail. How many days could your business survive without its data being available to staff and how many days would it take to recover from a major system failure ? If you don't know the answers to these questions, you need to find out !
What about systems security, is your firewall robust enough and set up properly ?
Is your data secure from unwanted viewers ?
Have you had a security audit to check network appliances are set up properly to maintain firewalls and ensure servers and data storage is secure ?