I am more into Asian scale and rithm mainlhy (arabic, Turksh). what model is bet to go for (KORG, Yamaha, Roland)?

any idea?
thanks

Arranger or synthesizer?

Roland (and some other less popular factories like Ketron) produce arrangers for Asian market. Other manufacturers arranger can also be adopted to oriental music scale, but they lack the sound (and arrangements, i.e. styles) of the oriental instruments, so You should get one with sampler (so that You can put the sounds You need by yourself).