Thank you all very much guys for your advice and for the will to help.
I tend more to psr s900 allthow is 50% more expensive here than korg pa500. 1600 euro (offer price) vs 1050 euro consedering that in USA the price difference is very small. But yamaha seems to be what I want.
ABout your argue you all have a point. Korgs are the most used here indeed. And Greek music is played maybe more than western in no tourist areas. But Actually my style is not ethnic. I am not very intrested in ethnic styles and sounds. Of course I might play for fun sometimes and I would prefer having nice ethnic sounds than having nice country sounds but it's not a priority. Priority for me is the western sounds and styles and how easy i can produce and record. Also the Korg ethnic sounds, sound at allmost any Greek club/restaurant/etc with live music and I am bored of hearing them!
If the recording result of the psr is satisfying as Ian said, that makes things easy for me. Could I hear or download somewhere any sample or demo of your work?
Thank you very much again and any opinion and advice is acceptable.
Dimitris