The attraction blocking much of the Epcot view is Soarin'. Having ridden it last week, though, we can forgive it. It's a great ride, one of the best at WDW!
For our last trip, we decided to take the advice of the UG and request an odd numbered room between 229-251, 329-351, 429-451 and 529-551. These view the quiet wooded area on the southeast side between the BC and the BCV. We got lucky, and they were able to put us in room 531. We had to agree, this was a great choice. There is relative quiet there, and (at least on the 5th floor) you can still glimpse some of Epcot and even the Boardwalk. This is definitely worth a try.