Just an update for you guys. I ended up buying the GS3 shortly after creating this thread. I've seen the iPhone 5 in the stores. I'm sure both phones are good. Debating between which is better is like debating between Pepsi and Coke. Both are good.
I do like the change from iOS to Android. At first there was a learning curve but I've since rooted (jailbreak in iPhone terms) and installed a custom ROM. I like the fact that I can customize the phone in a lot of different ways. The colors are very vivid and the system runs very smoothly.