I vote #4.. I would have voted #3, but that smudge on the hood really attracts the eye and defaces the whole front end of the car.
#4 looks pretty good, the rims up front fit perfectly, althought the ones in the back leave a bad black spot, its still not as bad as the smudge on #3. Also #3 has too dark of a blue to it.. Looks unrealistic. I like how #3 kept the realism, and i like the spoiler thats on the rear. Nice work.
My :2cents:..