Aren't the Samsung S7 Edge and Nokia 6 both 5.5" screens?

5.5" may have been a substantial screen back when the Samsung was released, but it's not big compared to other phones now, and is the same size as the Nokia 6 so no advantage there. But you also have a phone that's already over two years old, from a brand that's not known for its regular updates to Android. So, for less money, you can get a current-gen phone with guaranteed updates... Seems a no-brainer to me!

You can also get the 7 Plus for only a few bucks over $500 when on special, so that could be another option (much nicer in the hand than the 6).