The OWC ThunderBay 8 is available in configurations up to 128TB (8 X 16TB).
See my in-depth review of the OWC ThunderBay 8—awesome unit!
RAID-5 offers outstanding performance for reads, and very good performance for writes. Since reads are generally far more common, the practical implication is that RAID-5 performance in the OWC Thunderbay 8 is outstanding for most all uses with the benefit of fault tolerance. The speed difference vs RAID-0 will be of nil consequene with most all applications. Besides, running an 8-drive RAID-0 stripe is unwise, due to the risk of losing the entire volume from a drive failure.