I dig the 71/72 urethane “spoiler” bumper and the chrome bumper almost equally. I own both but went with chrome on my 72 just for the contrast; my paint is medium-to-dark and the chrome accentuates the grille a bit against a dark color. If I had chosen a lighter color paint, the choice would have been torture.
I also have a 73 and although the larger bumper is not my personal favorite, you would be surprised how many younger guys prefer the 73 bumper when they see it next to the 72. I think they are conditioned to modern Challengers and Camaros, and the 73 bumper looks a little more like what they are used to. Think about the popularity of the 2000 remake version of Eleanor: it has no chrome bumper but a modern ground-effect bumper. I have grown to appreciate the 73 urethane for what it is. I do plan to paint the bottom of it black like the below example (the gold car, which is not mine) just because I like the 71/72 side stripe style, but don’t like the rough transition to a colored bumper, or the stock attempt to lower the body line if you bought those stripes from the factory in 73.
No one’s asking, but I do prefer the 71/72 Mach 1 grille to the 73. I just prefer the horizontal sport light to the vertical, and the round headlight “door” to the square.