Yes, RAID would be worth it for your situation. RAID-10 is only slightly more redundant than RAID-5. With RAID-5 you can have one drive fail and still keep all your data, but a second drive failure and all is lost. With RAID-10 you have two RAID-1 arrays nested in a RAID-0. So it is possible to loose multiple drives and still be fine, but it is also possible that loosing two drives will kill all your data. It comes down to which drive dies. IMO, for your setup a RAID-5 would be sufficient, there isn't much point in going RAID-10, the space you loose isn't worth the minor improvement in redundancy. If anything do a RAID-5 with a hot spare instead.