Cant see the Medeli AKX10 having much of an impact on Yamaha SX models.
Ok it's a 'clone' with some great features and is super value for money, but there is neither the software or support pool available for this maker we have with Yamaha or any other of the big players out there, well as far as i am aware...
Have they even got a forum for help?
Maybe you have noticed a drop as......There needs to be some decent price gap between the 600 and 700, or too many people will simply buy a 700 for the small cost difference, which I think is a far superior arranger than a 600.
Keith