I went with the HTC 8X in the end. I'm sure the Lumia 920 is a great phone, it just seems it isn't the phone for me. Why?
1. I listen to music more than I take photos. While I couldn't care less about Beats and it will be switched off as soon as I can turn on the phone (I'd even like to cover up the logo tbh..), I can tell you that the built in amp is a big draw.
2. Size and weight. I have an HTC Titan at the moment and I love it, but one of the places I listen to music is at the gym. To everyone saying that people who think the Lumia 920 is heavy should go to the gym, well I do and I'm pretty sure that you wouldn't ever USE the Lumia 920 while working out. Having that thing in your pocket bouncing around while you run etc, just isn't good. The Titan is about the limit for that and I'm happy that the 8X will be significantly lighter. (No I don't want a separate device.)
3. I don't have a car, so Nokia Drive isn't very useful to me. Nor are many of the other Nokia exlusive apps, including music.
Yes I wish the 8X had more storage, yes I'm sure there will be more Nokia timed exlusive apps that I will want, yes the camera will be better.
The Lumia 920 isn't best in class at everything, and for a lot of people some of the issues (fairly raised in the reviews) are actually quite important. This isn't a paper specs race. You can't yet convince me of the value of Wireless charging no more than you can for 3D screens.
They're both "best" phones, just to different people.