B800i backups to disk

I really would like to hear from othe rpeople on this. I just bought a B800i and i want to use it from my B2D backups from Backup Exec 2012. Which is the best and fastest way for my nightly backups. iSCSI from my backup server to my B800i or just use my regular LAN. Both of these devices would be on the same Gigabit switch. Thanks.