There are 2 views that see the fireworks:
One is called a garden view, this view also sees spaceship earth and a canel with an alligator and turtles, the only unfortunate part about this view is that Epcot Resorts Blvd is also right below this room, we actually really enjoyed this room, my kids spent a lot of time on the balcony looking at the alligator. We also came back to the room, put the kids in the pjs and poped some popcorn and watched illuminations, then put the kids right to bed. It was the best vacation ever! These studio rooms would be 475, 469, 463, 563, 461 and 561. These rooms are a bit away from the main elevators, but close to the second elevator.
These rooms are around the corner a bit and don't get as much of the road noise or see the canel, they would be 561, 461, 559, 459, 555, 455, 540, 440-S, 544, 444-S, 550, 450-S
The second view that sees fireworks is called woods/wetlands, it also sees woods and wetlands (go figure), this is a peaceful view, but my kids didn't care for this room as much as the one with the alligator and turtles, these rooms would be 531, 431-S, 527, 427-S, 525 and 425-S. (The ones with the -S are smoking rooms)