It is definitely a matter of taste, I love Rome too and sadly have never been to Barcelona, my uncle (married into) is an Algerian who settled in Marseille when he was young, he still wants to move back there, I read around 40% of under 18's in Marseille have at least 1 parent who is an Algerian immigrant or something similar I remember you talking about being there for an England match, there is something about Marseille that does it for me though... Anyway this is quite off topic and on the topic M'bia is definitely proper quality and I would love it if we got him although I am surprised no bigger clubs are in for him.
http://www.rmcsport.fr/editorial/294746/mbia-a-qpr-jeudi/ This apparently says he's coming to Loftus road tomorrow for discussions, and probably for a medical