We prefer the pool view to Epcot view (mostly woods). I hear the top floor has a partical view. But also keep in mind the epcot show does not has many fireworks as MK, it is mostly low and on the water.
We did discover that our 5th floor room at BCV was facing MK and we had a great view of the MK fireworks (they weren't too big, but we could see them great.)
The walk to Epcot is so short we normally would walk over and stand the bridge to France, you get a good view there and you can show up right at 9:00 most of the time.