Please help me decide which of the above 3 phones to purchase outright. This won't be my main phone as I use a 6s+ as my daily phone with a different phone number. Since this purchase won't be for my daily carry phone I was thinking I should just get the SE but at only 64GB I would have to pare down the amount of data I have on phone. I currently have 60GB on 6s+. The next step up would be the 6s at $649 which would certainly do the job and I would get the SIM-free version. The 6s also can receive more bands (cell carrier frequencies), which is a nice bonus making it more of a world traveler phone, but this is not a necessity as I only travel one or twice a year. But then for $100 more I could get the 7, but the 7 doesn't offer a SIM-free version as of now. That's my dilemma. Any advice appreciated.