I was going to use this case,
NAS Case 8 bay, which is an 8 Bay case with a backplane for the drives. Then use a SAS card with Sas-to-sata connectors to wire them all up.
You could go that route if you're looking for that NAS feel of popping drives in and out at will.
The case isn't all that compact though as it's a regular ATX case.
Fractal has good cases for this sort of application though. I originally used a Node 804 which has more than enough capacity for 10 drives + 2 x 2.5" in the front face. It's mATX though. The new case I used which has easily IIRC 13 mounting spots for drives near the front grill and the side panels / front snap off w/o tools to get access.
www.fractal-design.com
The new Meshify 2 is a classic evolved with focus on distinctive design, spacious interior and rugged good looks.
www.fractal-design.com
The only reason I switched to the Meshify is because of ADL MOBO's being ATX with the features I wanted and limited release of mATX options at the time of the build. Both of them get good airflow though and are subdued without all of the rainbow farts if you don't want them. There's a single indicator on the front of either for power and that's it.
The 804 has 2 hangers on the storage side for 4 drives each and they slide out for mounting.
The Meshify has a "rack" system with shelves the drives mount to and then a couple of thumb screws to secure them. I could envision using a cage system though if you wanted to use backplanes and such as it has plenty of room and some quick modifications could make it work. Easy access to the MOBO for HBA's or SAS and since it doesn't have windows no need to worry about cable management.
Phanteks also makes some good storage options as well. The couple of cases I used had room for 6-8 drives in official mounting positions but, plenty of room for more if needed.
SAS is nice but, they seems over prices for the ability to take a single cable and fan out to 4 drives.
HBA's are cheaper and it's just normal SATA cables to deal with. I also streamlined my power to the 5 drives I have mounted using one of these
cables It's been working well since building in Nov. i was a little leery but though I would give it a shot and see if I could keep things tidy.