Not sure if this was obvious or if it would help, but I contacted the Apple store about my in-store pickup for the 64gb space grey iphone 6 and they said if I changed my mind I would be able to switch to the iphone 6 plus without having to wait in the non pre-order line if they had still had them in stock. Just thought I'd let anyone know in case they preordered the 6 but still wanted to make their decision when you can finally hold both in your hands and potentially decide on which device without having to wait a month (for 6 plus)!