$499 is unbeatable!
No other KB has similar features ( with quality sound,drums still punchier than S910). I am sure it'll be a hit both in and outside the US. (since PA 80 had good non western music 3rd part support).

Cheaper--More users -- growth or style support , I 'm hoping.

If you can ignore the key issue this KB can be used in both pro live and occational arranger / small home studio situation with flying colors.