Android vs iPhone - Better yet, iPhone, Samsung Galaxy 4s or Motorola Droid Razr Maxx Hd?

I have an iPhone 4 that I'm really happy with, but my work has asked me to upgrade. I can choose a iPhone (5 or wait for the 5s) Samsung Galaxy 4s, or any other Android device. It was just recommended that the Motorola Droid Razr Maxx HD was worth looking at.

Should I wait for the new iPhone 5s or move over to an Android device?

I like the way the iPhone works, yes, even the old iPhone 4.

My dilemma is that I just recently purchased a Nexus 7 tablet (Android), and love it. I use it for photography, specifically with the DSLR Controller app. (I do have a hot spot for internet connectivity).

There is probably advantages to having the same OS on both the tablet, and phone. One I know of is that using the DLSR Controller, if I had an Android phone I could use the phone as a wireless point to trigger my camera off my Nexus 7.

A concern is iTunes. I tried using the Google Play Cloud, but found that about 100 of my songs are under that DRM protection. I know there's software, etc, but seems like a pain, but probably a must if I want to take my music.

I'm a fairly casual user when it comes to phones. I don't do a lot of talking on the phone, but I do check work email (Lotus Notes Traveler), texting. Camera is not a factor at all. Seems like the only thing (at least in my head) holding me back is the iTunes thing, which isn't a big deal.

If you had your choice, which way would you go? And, if you do go to the Android side, which device?