That's kind of the catch though. Indian food is drastically different by region. Many american-indian restaurants will try to offer a full variety of various region dishes and may be great at some but weaker at others. So depending what a certain restaurant is good at and where your indian friend is from... you get different results.
That said, the more options the better in my opinion!
Oh man, that guy was awesome. I went there 2-3 times a week back when I was in Pittsburgh. I still haven't found better Indian food out in the Bay Area.