Hello Nedim,
one question for you,
are you saying the AUDYA's build quality is better than let's say a Roland G-70 ???
as you know i own a G-70,
the keybed is THE BEST of any arranger,
the buttons are THE BEST of any arranger,
the sliders are THE BEST of any arranger.
I would not say this is an opinion but a FACT, as i think 99% of those who have seen or played both the G-70 and AUDYA would agree
but i know YOU may disagree :-)