iPhone 5 vs. BlackBerry Q10: Which should you buy?

The BlackBerry Q10 represents the return of the original BlackBerry. And unabashedly so. Sure it runs the same BlackBerry 10 operating system as the full touchscreen BlackBerry Z10, but it packs it into the classic, keyboard package every hardcore communicator and enterprise accomplisher knows and loves. But how does it compare to the iPhone 5, and if you're considering both -- which one should you get?