I am testing a demo version of Bonzai3d and would like to try the new FormZ 7 beta next. So far I really like Bonzai3d. Exporting options from B3d to Keyshot seem limited. Any thoughts of natively supporting either of these in the future?
SketchUp users should give these AutoDesSys products a look. A simple UI, much like SketchUp.
As far as support for additional formats goes, it is all a matter of demand. As of now, demand for either one of these is pretty low.