If it were me, I'd ditch one of the PPs or one of the APs, that way you don't lose the brand variety.
If a PP then I'd sell the Aquanaut. For me the Nautilus is their defining sports watch and much better looking (never been a fan of the Aquanaut - the dial and especially the date window look cramped, and the hands clumsy).
If an AP then I'd sell the gold one, again on the purely subjective grounds that it's too blingy for my taste, albeit then you'd be without a yellow gold watch, if that's important to you.