Tim
thats a tough question as you will always upset some members as colour is always a personal thing
anyway from my experience of selling 35-40 of these since 2006 and without trying to upset anyone or causing friction i would say
in no particular order the top three would have to be :
X Power Grey
Star Silver
Black
maybe this sounds boring but the car looks good in these 3 colours
then you are into blues (not mirage), greens etc
then things like bright red (flame) is better than firefrost red metallic
from experience the solid, metallic, pearl, kinetic and supertallics paints are okay but the flip paints ( chromactive) are not desireable as they are a nightmare to paint so people are cautious of buying one just incase some numpty scrapes it !!
this is just a view point from my experience delaing with many people buying, selling and searching for a ZT 260
regards
James