I like them all. ;D
The Cadillac banner has it all---crisp, clear picture of the vehicle; Sharp contrasting background colors; stylish, clear, colorful wording. It got my vote.
I like the Equinox banner 2nd best, though I think the vehicle picture lacks some color clarity/sharpness. Just a little. Lettering and background are strong. Maybe, just maybe try a really thin black outline around the word Equinox. Just to sharpen the red inside the letters.
I like the vehicle in the Terrain banner a lot. I think the background needs something.....the red and darker top don't seem to mix that well. Not sure what would improve that. A darker top would hurt the vehicle picture. Unless you changed the vehicle color to something other than red or black. And I do like the black. The Terrain lettering is different, which in a way is good, because, well, so is the Terrain's look (as noted so strongly by the Cars review). I like the red outline of the Terrain lettering, but so much of the background is red, albeit a different shade. I'm fighting that background again.
Great stuff though, as always, Admin!! Keep up the great work!