You came here asking, "What to do?". I assumed you had no solution on how to get yourself an iPhone 6. I can't get one until February. Maybe August of next year, depending on what I do about a line. But I certainly won't feel inadequate. I'll want it for sure. But I really like my iPhone 5. I also like my Wife's iPhone 5c. Sometimes you have to do what you can. I offered you an option. Good luck and I hope you get yourself an iPhone 6 on launch day.
What has always worked for me is getting the most recent device when my upgrade is available. I've always gone the carrier subsidized rout. When I became an iPhone user, the 4s as the latest iPhone and that was the one I got. Same thing with the 5s. My next upgrade will be in November 2015 and I'm hoping the iPhone 6s will be available. Regardless of whether the 6s is available or now, I will get the latest iPhone.
I'm the same way. When I became an iPhone user I got a 4s. My upgrade was this past February, so I got the 5s in May. I'll be eligible for an upgrade again in 2016. I'll get whatever the latest iPhone is at that time, I'm guessing the 6s.