Not really certain that Stern's theme don't appeal to a European market. Most of the big block busters will play across Europe. Would love to see an Asterix themed machine though.... ..
I think that any marketing idea for "Europe" would be doomed to failure as the European countries are very different in culture. Eg Greece has little in common with Ireland in terms of popular culture which wouldn't also be covered by US culture.
I suspect the $7000 price tag in the UK to buy a new AC/DC basic model has more to do with people not buying them. If we could get them at the same price as the US then I know I'd be far more into the idea of buying a NIB.