Soon to be available (I'm moving HDDs from this case to my new unraid system).
Chenbro SR107 with
2x 84H210710-104 - 4-bay, 3.5" Hot-swap, w/4-port 12Gbps mini-SAS HD Backplane, SR107/108 (under accessories in case link above)
1x SK32303 - 3-bay 3.5" HDD Enclosure with 12Gb/s SAS & SATA Backplane
A rather voluminous, traditional, heavy, no frills, very sturdy steel case.
It's similar to the expensive Supermicro cases with 8x hotswap trays but is wider. They now offer the SR107 PLUS and I cannot see any differences.
Fits pretty much any size motherboards, any size CPU cooler and the three 12cm fans keep the contents cool as well.
It can be converted into a 5u rackmountable case. I have never looked into this and it is too deep to use it in this way in my network closet.
The side panels open from the front (after un-clipping the cover), which makes access when rack-mounted on sliding rails a lot easier.
I spent $400 + tax for the combo.
Asking $200, shipped.