I recently made the same eval of Prem vs Pro. I ended up picking up a Pro myself over the Prem. I greatly preferred the Pro cab art and trans-lite and didn't care for molded figurines on the PF (main reasons). I also didn't feel the disco ball and drop targets warranted the extra $2k.
As for the left orbit returning to right flipper, meh, the right orbit basically already does that, and having never played the Prem I don't miss it.
Really fun game though, I was surprised how good the call-out and sound package is, having previously only played on location where you can't really hear it well.
This game provided exactly what I look for in modern games, where the whole package comes together to provide a visceral, adrenaline-pumping experience.