Hi Brett,
If you are using the storage for file-sharing, in a Windows environment, you will HAVE TO use CIFS.
If you are also using the storage for other applications (block data), you can utilize the storage over FC or iSCSI.
Also, in the FAS22xx family, all the protocol licenses are bundled with the storage system.
Therefore, you don't need to buy any additional licenses as well.
And you can expand the storage system, irrespective of the protocols deployed.
Also, for file-sharing, if you have less number of concurrent users,
you can use SATA HDDs for the same.