You're gonna need a full 6 foot rack.
Brand does not matter, and features will determine brand.
The features I would recommend would be
1. Clip Tool. These help attach the audio equipment ears to the rack, in lieu of a screwdriver. Readily available.
2. Shelves. Not everything has rack mount ears, so a couple shelves to place UPS, Computer and Monitor would really help. Sliders are nice for units that are often disconnected. Don't forget a keyboard tray.
3. Gooseneck Light Receiver. The BNC connections make life easier to have multiple lights and switch them out, clear or red, as necessary. I'd recommend at least two of these, placed high and low. They look really cool like an old school MacIntosh amplifier.
4. Casters. You'll want to move this around to make connections, so this is really important.
5. Consider Stackable Racks. Something like a Plastic Gator Rack won't hold all your gear, but they stack and are easier to move around that a full 6 foot rack. Preference thing. Roadies use these.
I think you may find better accessories if you forget about audio racks, which are typically shorter and are found at B&H or Sweetwater, and instead focus on server racks, which have more accessories. I got mine from Rackmount Solutions. PM me and I can send pictures of my rack. Or if you are a perv, I'll send you pictures of my wife's rack.