I have an iPhone 7 that I bought on release. While I like the phone, I've found that I'm more interested in a phone with a bigger screen size and battery. Because of this, the Plus model has really started to appeal to me. Now I need help with this: Should I sell my 7 and buy a 7+ or upgrade to an 8+? I'm really liking the glass back design of the 8 series and the addition of wireless charging, but I don't know if thats enough to warrant an upgrade.