I kind of like the idea of tying SQL Server hardware to a SAN that is tuned to match.

A bit on the spendy side, but see where you are buying preconfigured performance.

http://www.microsoft.com/sqlserver/2008/en/us/parallel-data-warehouse.aspx

Our SAN admin only cares about the disk footprint we are using.

So they have the 'cost center to be reduced' view in sight, not what's the best return on investment for the buisness.

Greg E