I totally agree. All the fairly current arrangers can sound great. I have found the Korg PA3X to be extremely easy to use.
It has all the controls you would ever want, is light in weight, has excellent vocal processing and harmony, etc.
I have a 5-switch foot pedal that is very light in weight, plus a dedicated Hold pedal, dedicated Volume pedal and an extra assignable pedal. The three buttons that are preset for sound modification (like the SA buttons on Yamaha) are completely assignable, and there are two rows of 16 assignable sliders (they double as independent volume controls for style parts or realtime parts, OR organ sliders).
Main drawback to the Korg is in auditioning styles. You have to load them into user slots, rather than try them from USB stick. It's a matter of a few seconds though. A great feature is that you can replace any or all the factory styles with stuff you can actually USE, if you wish, or simply add new styles to the factory style banks.
The Korg has a real-time chord sequencer and two sequence players. For those into midi files, you can have both sequencers loaded and fade them in and out.
I do miss some of the fantastic Audya audio guitar and drum styles, but the difference in weight is worth it to me. Plus Korg has a better service organization than Ketron (who has none).
Having said all this, when the PSRS950 becomes available, it could well be the best value for the money ever offered in and arranger!
However, as much fun as it is to speculate, we won't know until we have one in our hands, and, knowing Yamaha's history, that could be months from now.
My tentative plan is, when the 950 arrives, and if it is as good as we think, I will sell my backup keyboard, a Roland E50, and add the 950 as my second keyboard. I always have at least two, because sometimes I have two jobs set up with not enough time to transfer equipment between. Plus you GOTTA have a backup for everything--keyboard, PA, stands mics--EVERYTHING.