I've stayed at all three resorts, in regular rooms,
DVC (except YC, of course) and club level, on various occasions. I am a HUGE fan of BC and their new club level lounge is A-Mazing. I can compare first-hand the club level experience at BC, BWI, YC, and the GF Sugarloaf building, and the new Beach Club lounge blows the others away. BWI has renovations scheduled, so they might be great, or they could still be renovating, in 2017. The Boardwalk area definitely has a fun party vibe if that's what you want. Our experience at YC CL was very bad but, again, I believe they are also renovating and our favorite CM from the Beach Club moved over there to help with the upgrade, so I'm sure they've improved. But for relaxation, luxury, and great customer service, I wouldn't hesitate to choose BC Club Level.
Good luck with your choice! I'm sure it'll be a fun trip no matter where you end up. F&W is my favorite time of year!