If your a man get a 7 small fits in your pockets no sweat, but if size is no problem and your a girl/lady get the S version fits in your handbag no problem.
Just my humble opinion. After using a 6plus for 2 weeks what a pain too big for me, but l'm only a small man [emoji38]
I'm waiting for the 8. My 5s is still going strong, and next year is the iPhone's 10 anniversary, so I'm expecting Apple to pull out all the stops.
Rumours are already flying about the feature set we can look forward to. Of course, it could all be hot air and the 7s might be a 7 with a paint job, but I doubt it.