I have had an iPhone for a couple of years. I use google mail and calendar on the iPhone for personal matters, including managing multiple calendars. I also use Outlook for my work e- mail. If you want an Apple email solution, there is no longer any charge for it. It's great to have all my accounts on the same device.
I use iTunes for music and to organize movies. I went a year after I got the iPhone without paying for any apps. Most android apps are available for the iPhone, including the ability to edit google docs.
If you live or work near an Apple store, the ability to ask for help with even the dumbest questions is priceless.
The worst thing about the iPhone is that it is an entry level drug. After getting the iPhone, we have since purchased a MacBook, an iPod Touch, an iPad and an iMac. The iPad in particular, has been amazing. Just yesterday, it allowed me to efficiently do a work project while on vacation.
Try out the options and see which works best for you. -- Suzanne