Those were the $300 or $400 ones from Costco I think; Multi-Williams designed by Clay Cowgill with a 13" off-the-shelf TV, crappy controls like the kind you find in those Pac-Man joystick TV game things, and very thin, flimsy, material for the cabinet, with 2-piece side panels.
The "UltraCade" machine linked to in the OP is built like a real arcade machine, and uses real arcade controls. I've heard they work well, but they are expensive (overpriced IMO) and ugly as homemade shoes. I don't care for random collage-type artwork. For "multicade" type machines, I think the best thing to do is design some generic artwork and call it good, like Nintendo did with PlayChoice, and SNK did with Neo Geo (two examples of "multicade" type machines from real arcade companies).