in addition to the observations on the wire management i'd say the pci backplate covers, the ones that are galvanised gray look f'n awful, they stand out like a i dunno what, but they look horrible... maybe i just really dislike that disgusting grey colour... i haven't had that grey paint in the last three cases, so it just makes me wince in disgust when i see it...
the flat black i love, like how you did the tt fan grill too, nice touch, maybe if you are good at taking fans apart (you know how to get the retaining clip off the shaft and back on again) then you could spray the fan red to continue the theme!

man i've gotta buy some spray paint... it's well overdue now...
nice work so far