Jacques, I don't watch much music on video discs. The relatively small collection I have is composed of ballets(Nutcracker, Swan Lake, Cinderella, etc.)where the visual element is obviously highly important. There apparently are six Carmens on Blu-ray and I haven't seen any of them. I did see the excellent Garanca/Alagna performance about three years ago on PBS and if I was going to get a Carmen Blu-ray, that's the one I'd pick.

A sample of the Final Scene is on YouTube here ,and Garanca sings Carmen's Gypsy Song in a concert setting here .
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Enjoy the music, not the equipment.