I too would choose BC for the simple fact that it is very close to EPCOT and DHS. You have boat, bus and foot transportation. AK is bus only and VWL has boat and bus.
FYI, try to rent from someone who actually owns points at the resort you want to stay at. You will have a better chance of getting that resort than being on a wait list with someone who owns into another DVC resort. We rented from a rentor who owns SSR points and were on a wait list for BCV. No luck as of yet getting into BCV.