I was thinking about my next dog, which is coming up soon. I was thinking

-Rottweiler
-Weirmeraner
-Chesapeake Bay Retriever
-APBT

I'm aware that they're all totally different breeds, but I've been researching a lot and like all of the breeds. I need help choosing out of the 4 though. Here's my profile.

-I like to swim, and would like a dog to swim with
-I want a friendly dog but a dog that will like me the most.
-I have a 1/4 of an acre, but we're moving and will have 2 acres
-Don't have much time for grooming... so short haired dogs are best.