Just waiting tentatively for the Vega launch in two weeks time before pressing the button, but the AIO cooling solution will likely give the Hybrid the edge for me.
Not a massive fan of the cards that have a copper base and an aluminum radiator after seeing the corrosion (galvanic) and leak in a mates PC a few years ago. (I'm guessing this is one as the AIO tend to be and I've not seen anywhere that says that this has changed (it may have).
I'm guessing they have also improved it a lot to stop it being as much of an issue but any anti corrosion fluid they put into the loop would only be able to slow it down and not stop it.
I guess it hardly ever gets to the stage where it ends up leaking for 99.99999% of the people but after seeing it happen myself and it taking out a few parts I will stick to all 1 type of metal in my loop.
I can't actually see the point in a GTX 1080 without a 4K telly. I'm not interested in frame rates above 60. The 1070 does 4K, the 1080 just gives me a little more headroom; just a little more futureproof.