Try to buy an original, I tell you is pretty good to have one, more if you have the whole apple environment, like apple tv, mac computer, Ipad, Iphone it is pretty cool since you can do a lot stuff with all together.
I'm a geek I have always two phones my personal (an Iphone) and my work related phone (and Android last one is a Z2 supe nice camera better than any of the trade apple trade mark yet and water proof) but even when I started with Android before buying an iphone (because it was way to much cooler than the Iphone in that year, I'm talking about Iphone 3s it hasn't flash integrated, my Android had micro hdmi output, better camera, screen of the size of the 6, 8GB internal and 16Gb external Iphone was 8GB at all I remember and MotoX had voice commands and siri wasn't in the picture yet) After I bought my Mac I discovered that it was pretty useful to have and Iphone (I see it as an accessory of my computer as the apple watch as an accessory to my phone) since every time I have to send a quotation or a propose to my costumers I can use my Iphone to open pages check the last documents about it I had worked on my mac modify them and then send it as a PDF to my costumer, that at least for me is the real value to have an Iphone something that android haven't give me at all. Even when Android from Motorola or Sony have a lot better hardware or have most capabilities on doing a lot more thing than iOS and better accessories they do not fulfill my professionals needs that my Iphone covers.