The 100+mW 473 I built is my pride and joy, and I wouldn't give it up for the world....although 700 dollars would tempt me
With that said if I could have a 589 of the same power output, I would choose it. The 593 I used to have was very low power, and while I enjoyed its uniqueness, I really need something 50mW or more because I am a beam lover. So....
I guess if all things are equal I would choose 593 out of those....but they aren't so yeah.
It was close for me, but I voted for the 593.5nm; although the 473nm is surely one of the most beautiful colors to own.
I currently have a very efficient 589nm, and as Sigurthr stated, it is indeed like having a miniature sun in your hands.
I've got to imagine that the 593.5, with its slightly oranger tint would be every bit as beautiful, maybe more so, especially if we could get them affordably in a higher mW range!