screen size, etc will be buying from refurbished site- apple if they have it ..no real hurry thank you for keeping me from wasting a lot of time on useless time consuming and unneeded research----
Since you keep your devices for a very very long time... I would go with the latest and get the iPhone 17. You'd not only be getting the latest technology for future proofing, but probably the best value phone and most bang for your buck.
Imho, refurbished phones just don't offer enough of a discount to be worth it. Looking at the official apple refurb prices, an iphone 15 starts at $529. I think you'd be better off going with a brand new 16e, or even a 17.
Third party refurbs can be hit or miss. A lot of them have screens that the phone might not recognize as an apple product, which can create quite a mess.