Well, I'll go against the flow a little and say I actually like the picture of the Challenger better, I think it looks good without the white. I think because the color is light it looks better with the black highlights, the white highlights seem like they wash out the color even more. But maybe that's just me, or maybe its the fact that the picture of the Challenger is a better photo to start with.
As far as the value of the car, I don't think keeping it this original color is going to help you much. It's definitely different, and if it came to sale time I'm pretty sure you'd find more people that didn't like it than did. So, at that point, having your car painted an nice common high impact color would probably be better. But I would totally consider painting my car that color if it was original. It's different, and I think set up right, like say with a black side stripe, black rear spoiler and maybe even a blacked out hood it would be a good looking car.