Landing one of these guys in a sign and trade would be great. It wouldn't be a bad idea to go after both. Imagine landing both guys and keeping Deng, Sefolosha, Noah, Gray as your future players and building from there.
P.S. This is a more realistic combo to go after then a previous thread which featured Odom and Arenas.
Since we already have a nice front court, out of your list Pax would most likely pursue BD. He's already looking for a coach to develope his young players and has already stated he's not going to overhaul the whole team.
But knowing Paxson BD is knowwhere to be found on his long list of prioritys this offseason.