I am also coming from an iPhone 4. Especially difficult for me since I absolutely loved my iphone. I decided I wanted to get 4G LTE and a bigger screen, coupled with the fact that I could still get unlimied data on Verizon.
Needless to say, I went to Verizon last night, got my S3 with unlimited data, and haven't looked at the iphone since. This thing is just too powerful. I live in an area with 4 bars of 4G coverage, seemed to browse as fast as my wifi.
I definitely miss the music player. I've been using player pro but it's just not the same.
I'll give Google Earth a try.