iOS and Android both has their own advantages and disadvantages...
My suggestion?
Weight their pro's and con's and choose which most suits you...
Some people like Android because of it's flexibility, such as Rooting and installing costum ROMs, as well as more variety of devices to choose from
Big to small in size, cheap to expensive in budget....
Whereas Apple focuses on it's simplicity, targeting those who do not like to tinker around with their devices... albeit you can still JailBreak your iPhone if you want to, but all in all, iOS is just more hassle free IMO...
Bottom Line, choose which one do you like more, and enjoy your phone without regret
PS: There is no iPhone 5 yet, just the iPhone 4S, which, IMO, is a very small upgrade from the iPhone 4.....
Also, Mobile World Congress just passed, and there will be alot of new phones flooding through the next month or so... such as the HTC One series...
Edit:After reading more of your posts, it seems like you are interested in completing your "ecosystem", that is another reason for you to choose iOS over Android right now, think about it