Wow that's tough. We have only stayed at an AKL studio and OKW. We liked both very much. Would you be staying at Kidani or Jambo? AKL has the perk of the animals which is amazing. And OKW has the perk of the boat to DTD. AKL is a lot smaller and OKW is HUGE!!!
Boardwalk = the boardwalk itself, walk to EPCOT, HS, Beach Club, Yacht Club
(if your into all of these things I would choose this)
AoA = its new, its very popular and you can walk over to POP.
I picked OKW just from personal experience...but if you think you would spend a lot of time on the boardwalk/EPCOT/HS - then I think thats your choice
Have a great trip to the world wherever you go!!!
-FantasiaMagic 

ixiedust