Just saw Natacha Atlas was discussed here. Have been listening to her music since I was still in Belgium (where she grew up by the way). Amazing how she fluently mixes Arabesque traditional music with "western vibes", both solo and with the Transglobal Underground.
I saw her live two years ago and had the honour to meet her afterwards and have a brief chat, and pose for a picture with her. She is a very shy lady, quite introvert, but extremely friendly once you start talking to her. She is also an anti-racism ambassador of a big international campaign. Anyone go to the record store, buy some of her stuff and dream away to Arabia while listening to Yalla Chant, Mistaneek, Bastet, Amulet (my favourite) and be amazed how she manages to turn "I put a spell on you" and "Mon amie la rose" into a perfect Arabic sounding song ; amazing covers and totally different from the original versions!
More metal-wise, check Turkey's pioneers Pentagram (outside of Turkey known as Mezarkabul). Metal with Anatolian/Turkish traditional instruments involved. I saw these guys live when I lived in Istanbul, including one gig on the shores of the Bosphorus with the lights of the Asian city part in the distance. Amazing. Most of their songs deal with pride in being Turkish, defending Turkey ("1000 in the Eastland" is about the war in Eastern Turkey for example) ; most songs are in English but their best one in my opinion is the song "Bir" in Turkish. Bir means "one" or in this context "The One", it is about how we should not fear anything because we all come from the same god, and how we should not have our lives dictated by what the imam/priest/rabbi says but experience our connection with god in our own personal ways.
The chorus translates as:
"Don't fear anything, neither life nor death
Because we are one
And we come from one same God"
"Hepsi bir, hepsi Hakk'tan" means "we are one, from one God"
(Hakk is one of the Turkish words for "God", even though in daily speech most people use the Arabic term "Allah")