I've seen a silver that has a transition to blue that is beautiful and classy! Not a fan of flashy colors, but if I had to choose I'd say the escalade blue

 

here's another exotic color, i always like the m3's blue...i think it looks real sporty, laguna seca blue



but if you're going for a classy look, i'd go with black or pearl white.

 

Don't get me wrong, I love the way a clean black car looks. I have owned one. But thats the thing, how often is it really clean?

 

Then you should really go with silver and add some pearl tint to it

 

There's a member on here who did the MB silver and it looks really sharp. I think the Laguna Seca has been done also, and not with really favorable results. Do a search and you should find pictures of both of those cars.

 

I'm not sure you want to paint your car any of those blues, Maybe that prurple would lookgood. I've seen a gs painted that both those blues before and they looked pretty bad. I have pics of the laguna blue on a gs so you see what I mean if you need them.

 

i think the blue's the M3 uses is too flashy for a GS.. i was thinkin' of repaintin' and picked out this pearl white color that has a purple/blue tint to it, not too blue, just like a hue of baby blue, it looks gorgeous IMO - it's from House of Kolors

 

you know.... ive always wondered what a gs looks like in that escalade......pearl?... beige type metallic color?... (u might notice i don't know the name)...its like a cream type color... ive also seen a gs in that color and heard it was stock but very rare.

 

now this purple is awesome