It would depend on what type of trip you are planning? A lot of down time or a lot of park time?
For us, we absolutely love AKV Kidani Village for an end of Aug trip. We did this last Aug and never went to the parks for 8 days and had the best Disney trip ever!
IMHO, our family would disagree about BCV. None of us like the pool area and we much prefer AKV over BCV for decor and amenities. The only plus for BCV, again IMHO is it's location. The Epcot resort area is great.
For our trip this Aug (23-31) we plan on splitting our time between AKV and BLT. AKV to relax, and BLT for when we plan on hitting the parks daily.