The more important question is: will you change your backup routines due to the fact that NetApp is your new storage?
E.g. if you plan to rely on SnapManager for SQL for daily (hourly?) backups, then your requirement for backup to tape is less heavy, as you can do it less frequently (depending on snapshot retention it could be weekly, or even monthly), presumably utilising NDMP.
With ONTAP 8.1 there is also SAS support to tape too, but sounds like you will have an FC library. Depending on your environment you might have FC switches to share drives across other media servers too.