I agree with the comments above on both features and stability. I made my choice a while ago to revert back to Vue 4.2, so I can create a scene from start to finish with minimal crashes (4.2 is not that completely rock-solid either). If you start a scene in Pro, you cannot take that scene back to 4.2. Conversly you can take a 4.2 scene to Pro. Vue Pro has many terrific enhancements but it up to each individual to determine if those enhancements add to both helping you design scenes and create better images. Checking the pricing... Vue Pro US$599 Vue 4.2 US$199 Vue 4.2 sidegrade to Vue Pro US$399 Getting 4.2 + Pro sidegrade is approx the same price, so I would suggest either getting both now, or getting 4.2 and sidegrading later (extra postage cost but Aussie dollar is increasing making cost cheaper :)). This would give you time to get accustomed to Vue and decide if its your application for the future and also give yourself the ability to get more features when you like.