If you're going to be running the machine in fixed basic VGA (640X480) then likely any front-mount VGA monitor will do the trick. For high resolutions, though, you have to get pickier.
Personally, I'd recommend the cheapest monitor you could find that met the specs. In this case, that's the Vision Pro monitor you found. That monitor displays up to 800X600, anyways. Sometimes you can find cheaper monitors on Ebay, but that's only is you don't mind waiting and hunting. Otherwise, I'd probably go with the monitor you found.
Unless someone knows where to get them cheaper, that would be my pick for retail.