... I can tell you what my thought process was.
I wanted a manual movement, not an automatic. The winding on the Lange 1 is hands down the best I've ever felt. It's a pure pleasure to wind. The crown is the perfect size. So the Daymatic was out.
As for size, I don't like to wear dress watches larger than 40 mm, so the Grand lange 1 was out.
Once I settled on the Lange 1, I had to choose which metal. I am more of a white metal guy, so that left me with white gold or platinum.
For some reason, I LOVE lumed hands, even on a dress watch. Since the white gold version didn't have lumed hands, that was out.
Finally, I really liked the way the moon phase complication brought a bit of color and depth to the dial.
So, I went with the Lange 1 moon phase in platinum. It's my favorite watch, and probably will be for as long as I have wrists! That's not to say this is what you should do. The rose gold Lange 1 looks great (I just saw one yesterday), plenty of people love +40mm dress watches, and plenty of people prefer automatic movements. You can't go wrong.