If your home computer is a Mac, getting an iPhone is a no-brainer. There’s just no beating the seamless integration with MacOS and iOS. But If you use a PC, the story gets a lot less compelling. You could make pretty a pretty good argument for it being a tossup between the iPhone and the new Galaxy.
All sources seem to indicate that the iPhone 5 will have an LTE chipset. it’s inconceivable that it wouldn’t.