I see you have a Samsung history of the Notes and the Galaxy. Are you interested in switching to the Nexus 6? I have the Note Edge and i go back and forth with it.
I had a nexus 5 and liked it but had no wifi calling when I was on t-mobile so sold it for a note 3 at the time . Considering it if I can get $500 for my note 4 so I can pay the rest of it off . I have like $540 to pay off the phone.