Michael Mina has a great "pre-theatre" deal if you are seated before 6 PM. Prix fixe of three courses for $55. The courses are smaller than those on the regular menu (which runs about $110 for a three-course prix fixe), but Mrs. nnn and I left completely stuffed anyway.
The biggest downside to Michael Mina is the atmosphere. It is basically open air into a hotel lobby, so it can be somewhat noisy. The food and service are great, though.
We also love Gary Danko.