This is just my opinion, but I love the Epcot resorts. The BC is VERY relaxing. Light, airy, colors and furniture. You can walk to Epcot in 5 minutes. The dining options are HUGE compared to WL. You have restaurants in the BC/YC, restaurants at the Boardwalk ( a 5 minute walk), plus all the restaurants in Epcot. You also have the Friendship boats to take you to MGM (or Epcot).
DH and I love Epcot too. We love just walking into Epcot at night, getting a great spot for Illuminations. I stay there with the kids while DH gets us some beers in England. Then when Illuminations is over and tons of people rush towards the buses and monorail, we just stroll throught the international gateway back to the Epcot resorts. Sometimes we even hop on the boat if it's right there-my kids love the boats.
I think the $800 difference is worth it for the location alone, but that's just me. Oh, there's also the pool at the BC. It's amazing. Zero entry, sandy bottom, really big slide, lazy river, great pool bar. The pool at WL, while pretty, doesn't even come close. You can also watch movies at night on the beach on a huge screen.
We have friends that will only ever stay at the BC that were once loyal to other resorts. They say after trying the BC, nothing else is good enough.