I'm very similar to you. I've currently have no phone and I'm waiting for the x, if it's sold out I'll buy an eight plus until the x becomes available.
I was on the iPhone 6 for three years until about a month ago. It was sluggish and I couldn’t hear people when talking on the phone. I intended to get the 8 plus for quite a while. Last month, I killed my phone a little too early when my water bottle leaked on it. I’ve been using my 4s in the meantime. This made getting the new phone today, all the more sweeter.