WOW very cool foursome, you have 3 that I would like to have, well 2 because I have a 5712, but would love to have a 5726 and 5167, and I'm not into dress watches but the 5205 is a very nice piece, huge congrats
About the trade, if you don't like the Aquanaut ok, I love my 5712 so can't imagine trading or selling it 1 second, but if you don't like it very much why not, if it was me I would trade the 5205 and the Aquanaut, the 5960 blue dial is really beautiful, but in your foursome, the 2 I least prefer, though I love them all, are the 5205 and 5167…
Anyways let us know your decision