I think the problem with two colors is that too many parts are divided between the two colors. There's too much of the contrasting/complimenting color and it should be simplified a bit. Maybe keep just one or two parts to the secondary color instead of half of the parts.
I finally got Paint Shop Pro installed and did a couple of quick recoloring jobs. The first is my idea for the "Greenie" inspired paint job with almost all of the parts being green except for part of the headstock (or all of the headstock on the ER). I didn't quite get the green color just right, but it should give you an idea.
Much like the pin striping, it looked better in my head. Unlike the pin striping, there's something about it that still appeals to me.
The second one is what I believe to be a closer approximation of the original OEM color - not a pure gray, but more of a bluish color. But it's really a subtle difference.

