Galaxy S3 is way better trust me. On the Galaxy it has a lot of free apps where on the iPhone it costs money. Also the Galaxy has an app where you could download free music without needing a computer and the iphone doesn't have the app and you will need to pay for music if you don't have a computer. Also my brother has the Galaxy and it's amazing, he got this app where he could play music from the Xbox from his phone. It's outstanding! Trust me and get the Galaxy S3
Situational to what you need. If you need a portable device and Internet anywhere you go then the iPhone is best, also get an otterbox. If you need something for web surfing as video watching then I say iPod, also get otterbox. I know nothing of the galaxy.
I heard galaxy sucks because it breaks easily, get and iPod 5 and IPhone 5 are very similar because you can get this wifi thing set up for the IPod 5 and wherever you go you get wifi (but you haft to pay monthly) or maybe that's only for the Ipad
I don't definitely wouldn't get the iPod. It's not even a phone. I like the Galaxy but it just depends if you prefer Apple or Android. Chances are if you have a bunch of other Apple stuff at home you may like the iPhone mor but if you are pretty open to different types of computer you may like the Galaxy.