Funny enough, my girlfriend wanted one too and checked and Polaris had all colors in stock for 512 GB, so I ran on lunch and grabbed one. Getting hers later this evening as well. I knew I'd find one in store faster than ordering online a few weeks after launch.I think I got online around 9am to reserve one. My pickup was when they opened at noon. They still had everything at that point. They said they typically get two shipments a day (not always iPhones).
As of now (1pm), looks like the closest silver 256 max is Akron.