Yes, to my ears I find 5 and 6 the most authentic sounding. The fact that I was never taught on piano, I cannot be the best judge from a piano player perspective, but from using the Tyros piano's I can say they sound very authentic in the total mix, style or multipads.

For straight or solo playing, at least from an arranger perspective, I would think best results would be achieved played through a connected weighted controller. Of course the better quality samples and complexity of the total sample set will show through.

For me, programming piano tracks within a mix and the odd solo piano part played on my Tyros arranger work fine for me.

Marcus