Back in the 80's I lived in and around Atlanta and at one of the more upscale shopping malls there was a Steinway store. The guy that managed the place didn't mind me coming in from time to time and playing the pianos. What I was most struck by (other than the price tags) was how very different each one sounded to the others, even pianos of the same model. When I started down the rabbit hole of searching for a piano via hardware and software, I realized I was not searching for A piano, I was searching for THE piano. I also realized that this was a fool's pursuit, because so many factors were at play, ie, the sample itself, the speakers used for playback, the room, etc, etc, and at a certain point kind of abandoned the quest. It may be the OP is searching for THE piano, and is not finding it in the Px5S's sample set. Ultimately an offering from Yamaha, Roland, Kurzweil, Nord, etc. may better fill the bill. For myself, the Px5S's piano sample, with appropriate EQ, velocity and attack tweaks, gets me about 90% of what I want in most gigging and studio situations. I especially appreciate how adjustable "on the fly" all these factors are in the Casio, which allows me to make adjustments situationally without a lot of menu diving. Good enough for this guy, especially given the $$$....IMO fabulous bang for the buck, but everyone's mileage is going to vary......