It looks like scalability is a key requirement here, considering the growth you are expecting. In that case, a Fibre Channel SAN solution makes more sense than using SCSI-3. SCSI-3 works very well and costs less to implement originally, but I think the initial savings would be consumed over time by management costs.
However, SCSI-3 has faster performance than FC today. The real question then is if the systems you are using are fast enough to take advantage of SCSI-3, much less the full bandwidth of Fibre Channel. My guess is they probably are not.
This was first published in March 2001