If you want great Indian food outside of India - go to London! I live in an area that has the largest Indian contingent in America and the food is not even as good as the famous 6th Street in NYC. And yet, in London, you can get delicate Indian food with floral notes from rose water that will make you wish you lived in Calcutta. I think the cheapest people from India moved here bringing their cheapskate food. I imagine the most creative folks left India for Great Britain 50 years ago and England is the better for it.
It is SO different from what we get here in the States, but very good! We like both kinds.