Where is the best place to eat in Cardiff?

A tough one.
It depends what food grabs you most I suppose.
There are so many fine restaurants to choose from it is difficult to say, but for curry I would say either the Juboraj or The Mango House.

I have heard good things about The Mint and Mustard too, plus Punithas also seems o get rave reviews, then you can add the Cinnamon Tree and Cardamom too!