Thank you all! Lots of research for me to do. Thanks for the links, but the Russian is sometimes a problem: when you think 'woohoo, mp3's!' I click once more and find myself on a site where I can't understand anything...
I read in a French interview with Serj Tankian that he especially liked Karnig Sarkissian, Harout Pamboukdjian and Rouben Hakhverdian.
Yeah, rock is universal, and calling them nu-metal would be some sort of an insult, but some of the singing lines do have a sort of eastern flavour, and lots of times you'll hear those 'ringing' guitar/mandoline things.
I'm also interested in the lyrics of SOAD, concerning the diaspora. I read on several websites that the song Chop Suey refers to something which a 'Father Armeni' stated, with the 'Father, why have you forsaken me'-part in it?