I've been on a quest for great biryani since visiting India about 15 years ago. Most in NYC have disappointed, and are nothing like what I had there.
The best I've found so far is at Sapphire, on Broadway around 63rd - light, lots of herbs with clear distinct flavors, not masked by generic orangey or tomato-y sauce/seasoning. I generally like a veg biryani, as the meat preparation distracts from the qualities of rice, nuts, spices/herbs.
Would love to hear anyone else's recommendations!