The X and the pro both have the z axis held at the top by a bearing and this isn't a good thing or good feature.

The Monoprice isn't a Creator X Clone, it is a Creator X made by the same company that makes the Creator Pro...

The price on the Monoprice is good, the upgrated Zstage and Zrails can be had for $75. Then you can make a tupperware cover or get the Pro cover for 60 bucks or so. The front doesn't need a door, you can use some plastic clips and some plexi to cover it. My first printer was a Creator X. Still works good today. I got a top for it, and still use the plexi cover I made early on.