You need some creativity.
I suggest you draw on paper for your plans first. Then color it in, and see how nice it would look. If it doesn't seem nice, then draw again. After a while you would have a lot of designs to look at, and you can tweak to your desire.
Personally, I have the HAF 922, the little sister of the 932. I was thinking of painting it matte black too, and putting in blue accents, but I haven't finished my mockup design yet.