I just ordered an iPhone 6 Plus 128GB model from Apple. It was unavailable for pickup in Apple stores at this time and they say 3-4 weeks with free shipping. I had an order in with Target from the first week available but it seems all they ever have are 16GB models and they couldn't tell me if and when they would ever get in what I wanted. Their website says available in store only yet when I check availability no Minnesota store had them. So I gave up on them. Too bad for me though, because I do get a 10% retiree discount on top of a 5% Target Redcard discount if I bought through them. :(
I'm amazed at the demand for iPhones. I thought after a month everything would have died down. I went to the Apple Store yesterday Friday at 2 PM in the afternoon and it was packed with people. They had a sign placard set up to order iPhones and there were a half dozen people standing in line waiting to place orders. So, I asked. They were sold out of every type of iPhone. They suggested I just order it online. They said when they did get shipments in (every day) they have been snapped up almost immediately.
I've gotten by with a 32GB 4S but I am thinking with slow motion video and all that I will probably eat up a lot more gigabytes now. 32GB was already requiring me to edit out my photos, videos and apps that I didn't use so I figured 64GB might not be enough.