one thing to think about - I recently got my 70 Dart painted Plum Crazy. The shop owner asked whether I wanted original Plum Crazy or the new version. I said original, and he said that's good because if I wanted the new stuff it would cost an extra $1200 for the paint. Don't know if the same would be true of Go Mango...
Yes, I heard a similar story on this paint. I don’t know if it was that much though. Could be the extra is pearl or metallic additions. I am happy with how it’s turning out.