As a European myself, one of the reasons I'm applying to places in America is because an American Ph.D can open doors in both Europe and America, whereas a European Ph.D, unless it's from Oxbridge or a mainland equivalent, only really opens in the doors in Europe unless you're really good. One possibility for you could be to take a Ph.D in America and take a study abroad opportunity at a European partner? or even, try to apply for a Fulbright scholarship and get an MA, and then you could apply to a Ph.D in America with "Fulbright scholarship" on your CV.. anyway, unless you're absolutely sure you want to go to Europe, I'd suggest getting your Ph.D in America.