Thank you for the dimensions. It turns out to be exactly the same width as the hush. The hush is not quite as deep, and about half the height! Very good. Yes I've found my new machine.
Keep in mind the keyboard, mouse and joystick ports are on the right-hand side, 2/3rds of the way back. You need to allow for an extra inch or so of clearance, (and more than that if you plan on reaching back there, rather than the plug in, slide back) otherwise you'll have a nice snug fit with no way of actually getting any inputs. ;-)