It surely is a rational thought that an advanced arranger covers pretty much everything that a simple one does. I also felt that I couldn't afford to buy anything less than SX900 once I got the chance. The styles are so rich, I enjoy the acoustic drums, they are so deep, I can use new sounds for playing or any older sounds from a "legacy" folder, the 128 voices polyphony allows to play multiple piano notes with strings as a layer, with an accompaniment and also add extra tremolo strings to my left hand controlled with an expression pedal... something I can never do with Casio or PSR-E series...
Is there nice oboe on those keyboards? I don't think so. Does their electric guitar sounds realistic? I doubt that... And you know how I like to use my expression pedal as a pitch bend. So me having SX900 is totally reasonable... At some point I feel myself as a Russian oligarch who lives in a big mansion and speaks about modesty. He would never give up any of his possessions, yet thinking a lot of ascetism. However, the fact that he can't give it up doesn't mean that his thoughts are wrong.
I was at McDonalds today, only for a moment. Well, to be specific, had to use a restroom. Surprisingly enough, there was some piano music playing through their speaker system. It was not sophisticated, something light, even the piano samples were not of a high quality, like some average keyboard. Just piano, no backing. But I thought to myself that it felt just right. Yes, you can change these samples to Steinway Piano, you can add an orchestra to it, and then it would sound just heavy.
These days I'm working on some songs with my SX900. Some part of me tells me "well, you should make videos of it, you haven't been posting anything for a while". Another part of me tells me "this is heavy... you've got enough of heaviness... it's not innovative... just get some Casio and play something crazy!"...
Yes, I can immitate some Casio with my SX900. Revoice the styles, and I can actually download any sounds into this arranger. But... that would be actually pretentious.
As I was saying earlier (or was about to say), I started to have these thoughts about 5 years ago. Perhaps, the problem is that even a Russian oligarch can't know for sure if his possessions are secured. He may fear that loosing something he will lose it all. And I'm thinking "how can I not get better EP sounds when what I have now is so obsolete?" or "how can I live without decent oboe and electric guitar sounds?".
But as opposed to those arguments I have "remember the song you composed with Casio CTK-511? When was the last time you were composing like that?" or "that piano tune at McDonalds didn't have any oboes or guitars at all and you liked it anyway".
So I will add PSR-E463 to my PSR-SX900 and that won't be pretentious, that will be about modesty. I will have no extra room at all, and that will be about freedom. Like that oligarch adding Hyundai Solaris to his Rolls-Royce...
You know, it doesn't look that obvious to me at all...