Ok, on a more serious note:
My personal opinion (which coincides with general consensus) is that if the car is something special, like a Boss 351, full options Mach 1, rare engine/tranny combo (Shelbys on the older vintages) and the like, you stay with the factory color.
If it´s just one of the other thousands of ordinary cars, you do whatever you like.
Now the Argent is not a bad color at all! With some stripes and the blacked out hood, it can look real sharp.
Plus it will never go out of style, which may seem irrelevant at the first moment but, remember, you´ll probably have this car for long time.
When I had mine refinished, it was red. Going back to the original Medium Brown was a huge No-Go for me, so opted for the yellow it sports now. Reason was that after the years I had had a red car, I wanted to have something else for all the money I was gonna spend, hence the change to a color I really liked.
But I would be lying, if I said that I did not get weary of the flashy yellow on some days. Then again, I think it looks real good. (See above under "going out of style")
So, bottom line is: You´re spending money, so you should have a result that you like, not one dictated by some obscure rules made up by the vintage police.
First thing you gotta do, is make up your mind and decide what you want it to be like.
Flashy? Maybe a Grabber color?
Classy? Dark blue or black?
Discreet? Gray, argent?
Tribute car? Bond Mach1, Eleanor?
Know what I mean?
By the way, mine was meant to be sort of a Mustang replica of the Nash Bridges Cuda!