Don't buy the iPhone 6 unless you want a stuff ton of micro-scratches over the years, sure the saphire glass helps it, but its still prone to Micro Scratches and since its a full aluminum body it gets mini dents easily from a fall from just less than five feet.
I got this info from one of my uncles that has owned a iPhone 6 plus and got pissed at how it got wear without a case since release.
Personally I feel the iPhone 5S was one of the last good ones.
Though if I where you OP I would go for the Galaxy 6 NON EDGE, you can't get a glass screen protector on edge, and if you find one its going to be very expensive, also the edge is kind of hard to grip, its got a strange feel to how thin the sides are.
And I got to try this one out while "cleaning apps" from a family member's S6 Edge
Personally I use a Lumia 640XL, I'm one of those few guys that like Windows Phones.