Looking pretty good.

I think its the camera position that youve got but it on the 2nd render it makes the part where the door frame/windscreen frame meets the body look like it dosnt continue properly, although in the other renders it look fine, so its either the lighting position causing a high highlight on that area, or the camera angle.

I also reckon the shader could do with a tweek, as the fresnell effect looks a tad over done in the mid angles, it kinda goes form virtually no reflectivity to full without a nice ramp up to it if you get what I mean.

Also to iron out the look and get a better overall sense of the car In a studio render I would make the background white as the coloured backgorund kinda "taints" the look to it and gives a bit of a false impression of the specs.