I'm due for an upgrade but can't decide between a 4S or a 5. Either way I go I would like to get a 32 GB model. I have a 16 GB model iPhone 4 right now and have less than 1 GB left. There's a couple Best Buys near me that have the 4S in stock but they are really limited. Also since the 32GB 4S is so limited what if something went wrong with it and I had to exchange it? Any advice is appreciated.