Thanks for the detailed response Mark.
I’m actually not planning to put any media on the fusion drive. That’s part of the reason for the PCI expansion chassis… so i can use my existing hardware and drives. I have a few RAID 5 drives… but mostly I edit on an OWC Mercury Elite QX-2 and a RocStor ARCTICROC 12Tb.
Actually… in regards to your iMac…wondering how you get 2 drives in an iMac… an SSD and a Hard Drive?
I got the biggest fusion drive cuz it just seemed like a decent price to add 2 more TB ($150).
I certainly plan on getting a thunderbolt or USB 3 raid when I need more storage… which is why I opted for the docking port, so i wouldn’t waste one of the 2 thunderbolt ports on my monitor.