I've had stationary PCs sonce the 90's and never cared about led or glass, so I have of course been through all design trends during the past 25 years. I can simply sum it up as:
White cases make everything more visible when you're working on the hardware.
Black cases don't appear as dirty if you haven't cleaned it for 30 minutes.
If you're looking for it to look subdued (which I would assume based on no-led no-glass) I would go with black. If you want it to catch a bit more attention, white would be good. If course, personal preference should come first.