There really isn't a view of Epcot since it is a bit far. there are resort views which are nice, or Water views. If you want to see much request a high floor.
There are rooms with views of Spaceship Earth. You can even watch the Illuminations fireworks from them. We've had them a few times. I can't remember the numbers, but I do remember that you need to be on at least the 5th floor to get a decent view of them. Try posting this question on the Swan and Dolphin thread stickied at the top of the resorts page. There are S&D experts who could give you some #'s.