First ensure that the SAN replication preserves write order and is certified to work with SQL Server databases. If not, then you've got a russian roulette DR solution there. Also make sure that the latency on the replication does not result in unacceptably slow IOs on the production server.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability