iPhone 6s for sure! I switched to Android last update, and I am starting to regret it because iOS has improved greatly since then. I am ready to come back!
I would rather have the ipad air 2. I wanted one since i don't currently have a tablet. 6plus is my current phone and need a tablet more then a upgrade.
Got iPad Air and loving it. For handset got iPhone 4 and still loving since all these years. Looking forward to have it to be upgraded with its' big big brother