As with all keyboards. the ultimate choice lies with the buyer, and once you've made your choice. ENJOY IT.We all buy what we think will suit us at the time. We do this after reading reviews, checking out recommendations, and by listening to the instrument on Youtube channels, and possibly even by looking at it or even playing it, or having it played to us in a music store where that is possible.
Then you need to factor in the most obvious question.
How much use will I make of a new keyboard? How much can I afford to spend on it? How will it perform better than my existing keyboard? Do I actually NEED rather than WANT it?
So many times I read that a certain sound or style 'isn't as good as I had hoped' or 'I can't get a realistic sounding piano sound'.
All that says to me is....You didn't do your homework before you opened your wallet. There is NO keyboard made that sounds EXACTLY like a grand piano for example. Kid yourself all you like, but If you really are that picky and want that much emphasis on it, then buy a piano! But you'll probably still find fault with it....some people are just extremely difficult to please......and lose reality.
I recently decided to pension off my ageing Yamaha Tyros. And I started looking at alternatives. Newer technology, up to date software,less risk of component failure, better portability and added features. I had already decided that I was going to stick with 61 keys. I've had longer 76 and 88 key instruments and keyboards, but they take up too much space for me.
But being as this is the SX Forum, and not the Genos forum. I was surprised to see all these comparisons with the Genos. WHY
Sure....We'd probably all love one. But they are a VERY VERY expensive keyboard no matter what they can do. To me they are a stage instrument and that's all fine if you play for a living and make money from playing. I don't.
Which brings me to how I made my decision to buy the yamaha PSR SX700.I can afford to go out and buy a Genos. Right here, right now. No problem.
I can also afford to buy an SX900 right here, right now.
I'm not rich, but I can make a sound economical and financial decision. So Why on earth would I even need a Genos? And the 'extras' on the SX900 just didn't add up to another £800 +/- for me. Chord Looper as an example. Bluetooth

? not even interesting. But again it's a personal choice.
So, I decided on the SX700 because I am a home player, and I firmly believe that unless you have so much money that it doesn't matter to you (and I suspect there are very few of us in that bracket) if you are not using your keyboard to perform with
which then alleviates and justifies the cost, as you'll be making money from your gigs) then why on earth would you need such a powerful keyboard as a Genos? You just wouldn't.
Just my take on it.
Just buy an SX600 or SX700 or SX900. Perfect for pretty well all home users. And very portable too. So if you DID ever want to go and wow Grandma with it, you can just stick it in the boot or trunk of your car, or under your arm, plug it into a socket when you get there and play it. No extra speakers, no miles of cables........Simplistic and very modern.
The only thing I HATE, absolutely hate, about the SX series, is that the manuals have been written very poorly indeed. You'll learn far more on these forums and stay a lot calmer than from trying to read those manuals.