Very nice job! Really like the flat black background.
One other area I think the detolfs can be improved is the height, the bottom shelf IMO is too low. I'm in the process of combining two cases into one and raising it. Here's my thread on it:
http://www.therpf.com/f12/ikea-disp...ns-other-such-things-231160/?highlight=detolf Doesn't yet show how I raised them, but I actually just got the stand built yesterday and sat them on top of it. For a single case, I think it would look best to get some tall baseboard molding, build a simple box about 7/8" (thickness of detolf base) shorter than the baseboard, sit the detolf directly onto the box (don't use the plastic feet), and wrap the baseboard around the box/detolf base. Raising it up around 6" or 7" would do a lot for the looks. You could also add some small crown to the top of the detolf to finish it off. I think a more modern base and crown would work with the detolf versus a traditional style.
Here's a sketch of what I'm talking about:
Just throwing out ideas in case your interested, your case looks good as is.