In your price range, check out the Generalmusic WK1oriental. It sells in the USA for $695.00 and has dozens of Turkish, Arabic, Greek styles and very good middle eastern sounds with quarter tone tuning buttons on the front panel.
The Korg doesn't have any styles and sounds unless you load them from disk and there is no quarter tone tuning direct buttons. You have to do this through many pages of the operating system.
I sell all the orienal keyboards in my store in Southern Callifornia. Let me know if you have any additional questions.


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George Kaye
Kaye's Music Scene
Reseda, California