..In the Technics days, I would buy a new model every time one came out. I knew they were holding some great options that were not on the new model, I bought without playing one...
I was at the same train until the KN7000 came, but the keys placed down between two edges and the new design/place for many buttons was a dealbreaker for me.
Tried it several times, but never got friend with it.
Was about to buy KN6500 when KN7k came, but stoped at KN5k. Too bad, but as we know, sadly no more new KN's.
Regarding Yamaha, I was not much fan when had T4 because of the 'CD'ish, cold and crisp' sound (my very personal opinion).
But something turned me around when Genos showed up, now I simply love it, and regardless of what other T5 or T series users say, it sonuds different, and BETTER!. (Again very personal opinion).
Even if I'm lurking to get hands on a Korg PA4-76, I would not hesitate to go for a Genos 2 if it ever see the light.
As the SX series is the 'little brothers' of the Genos, I guess they are above the PSR series in most, or maybe all ways. 👍