As a caveat to my opinions on the Davinci. The thing has been a beast for an older budget machine. It seems to be one of the first machines to offer good print quality and build volume, in the days that it was released, for it's price point. I have had only a couple hiccups with it, and think my current issue are related to using it in an unheated garage in the winter. Before that I got about 600 pretty dependable hours out of it. It's down side is the lack of controls, the proprietary software and filaments, and the pain of retrofitting anything to it. If you want a plug and play, dirt simple machine that doesn't require fiddling with a slicer program, then I'd actually recommend it. But if you want to go beyond the simplest of settings, and you will, then look else where.

CA, I think you recommended a dual extrusion printer a while back, enclosed, good build volume, on amazon for about $600. I've forgotten it and lost the link. Any idea what I'm talking about?