Hi,
I hope you'll have your Nautilus soon! 
I think the 5711 and 5170 would be perfectly complimentary, but I would be already very happy to get the Nautilus.
Yes I had once the opportunity to try one, not twice alas. I still see it on my wrist.
After reading all these answers, if there's only one, I know which one! 
Cheers
Dje