@simoncbevans
I have used a basic SM a long time ago. It was great for navigation, but I never really got it set up and always headed to the keyboard, that is why I am leaning a bit more towards the Pro or Enterprise as you have a few more buttons close at hand. I am currently a keyboarder and mouser.
@PaulMcAlenan
Those are interesting! I do like how the buttons icons on the Stream Deck are programmable. I am mostly in SU/draftsight with a little in Blender. I just recently added CloudCompare/Meshlabs to the mix. I also like to limit the number of buttons I have - reducing the amount I have to remember. 
@kevin58
Thank you for the screen shots!
I will most likely be spending a few days, testing out different button configurations once I get the mouse.
Off topic a bit → Which scanner do you have? I just got BLK360 and still working out my workflow.