The only thing I don't understand when comparing the Titan II and the Lumia 900 is that so many people say they prefer the Lumia because they don't want such a big screen. I've seen that, read that, and heard that in at least a dozen reviews. THE PHONES ARE THE SAME SIZE!!! Why wouldn't you want the bigger screen if the two are so close in physical size. The Lumia just means there is more dead, wasted, space on the face of the phone. Where as the Titan II's screen practically goes corner to corner. So to say you don't want such a big screen is just a completely bogus reason to choose the Lumia.
Now, the Lumia certainly has its advantages, such as the screen technology. There's many other reasons why to choose the Lumia, but screen size just isn't one of them.