If you ever are going to sell it, the value will be greatly reduced by a color change.
I have a friend who bought a nice '70 Roadrunner convertible last year that had been FK5 with a burnt orange interior, but someone had repainted it FJ5 with black. He got the car for under 30K, and I'm sure it would have brought over 35K if the color hadn't been changed. He curses the previous owner who changed the color but doesn't want to spend 10K to change it back.
I was no fan of FK5 when I got my convertible, but I really have grown fond of it. I now have a dark autumn bronze '71 to keep it company, and I wouldn't trade either car for an identical version in a high impact color. In fact, I was at a show last weekend with the convertible and several people complimented me on the color, and how nice it was to see an unusual Mopar color when half the other cars at the show were either purple, red, or bright green.
If I didn't already have my B5 '09 R/T, I'd go for a toxic orange 11!