People have different taste in biryani like some people likes more spicy and some like less spicy, so I'll suggest you to explore Jama Masjid. You'll definitely find your taste.
I love eating Biryanis. And my favourite places to eat biryani are : Biryani Blues, Behrouz biryani and Biryani&Co. I would say BIRYANI&CO is the best. Affordable yet super tasty! One should definitely try ordering from this place.