I found it! This is "the one" for me.
Here it is without anything on it:
Here is a set-up someone else is using with it:
Here's a link to one place it's available at:
http://accessories.musiciansfriend.com/product/Studio-RTA-Creation-Station-Studio-Desk?sku=546550
Their description:
"The Studio RTA Creation Station Studio Desk is a complete computer-based home studio workstation. It features large casters (2 locking) for mobility and a large workspace for most synth keyboards and accessories. The inclusion of a monitor shelf, dual 4-space 19" rack bays, and a rear-mounted cable management panel makes the Studio RTA Creation Station a great addition to any pro or home studio."
The price at that site:
$199.99
The specs:
Studio RTA Creation Station Studio Desk Specifications:
* Overall dimensions: 59-1/4"W x 37-1/2"H x 29-1/2"D
* Top shelf: 51-1/4"W x 3/4"H x 12"D
* Main work surface: 59-1/4"W x 18"H x 29-1/2"D
* Bottom shelf: 59-1/4"W x 3/4"H x 29-1/2"D
Studio RTA Creation Station Studio Desk Features:
* 2 large work surfaces
* Full-length monitor shelf
* Dual 4-space 19" rack bays
* Rear panel for cord management
* 4 casters (2 locking)
From looking at the pictures it looks like it might have a shorter width, though it's 59", just about 5 feet, a perfect fit. It's low enough. The space for the screen is a tiny bit high, though having that rackmount space underneath and directly in front of me more than makes up for it. It's also pretty inexpensive considering the size and features.
Now to price-hunt and see if I can find it at an even lower price.