Hi Andre,
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.
Regards,
Radek