There are some great comments above so I'm not going to pile on. But here are a couple of this in no sense of priority.

The Intellijel 104HP 7U case is also available in black. (I'm sensing a theme)
Intellijel makes some nifty stuff in the 1U that includes a vector scope, a noise + sample/hold/slew module, and even some USB tiles that are great for mounting a USB reading lamp or two. You'll want that since your color scheme is going to be pretty dark to begin with.

For additional modulation you may want to check out Noise Engineerings "Clep Diaz" and/or possibily their Mimetic Digitalis.
Ricky Tinez uses a lot of Noise Engineering products and features both in this video.

I think you can also get replacement faces for the Maths in black.