I figure I'd throw my hat into the ring for "most impressive computer/multi-media setup" so that you all could feast your eyes on this:
What you are looking at is a 50" 4K Ultra HD Smart TV, 40" HD TV and two 17" DVI Monitors, all connected to my computer with specs of an AMD FX-8350 8-core CPU, 16GB DDR3 RAM, with a 256GB SSD, 1TB 10,000RPM HD, two 2TB 7200RPM HD's, a Blu-Ray Drive and DVD-RW drive, and two Radeon R9 200 Series GPU's, running Windows 7 Pro 64-bit. Also connected to the 50" 4K UHD Smart TV is an 1000 Watt Surround Sound System, a PS3, PS4, Wii U, and Sega Genesis Classic, as well as my wife's computer, not pictured, to the right.
The two 17" DVI Monitors slide out to reveal hidden storage spaces behind them:
Behind one I store some of my PS3/4 games, and the other, an HD dock with another 2TB HD and an 500GB HD. Below that are a couple of USB Hubs with various cable connections to connect and/or charge other various devices. Have to admit, I'm pretty proud of the setup I've got going on.