If you absolutely must be close to the stage, sitting in floor Sections F3, F4, F9 and F10 will get you as close as you want to be, especially when the stage extends into the floor seats.

But for a better view of the stage, Sections 121, 122, 137, 138 are as good as it gets. These seats have a more elevated view than floor seats, and they're nearly as close to the stage as some of the outer floor seats. Besides for seats that are right up against the stage, low rows in those four sections are easily the best.