I have a 1 1/2 drop on my car with 18's, just make sure your tire profile is a 40 series or lower. I run 245/40/18's front and 295/35/18 rear, When I replace my tires i'm changing to 265/35/18 front, and 315/30 or 35 18's rear. On a side note I'm loving these nitto's, they still look new, and they grip very well for a long lasting tire.
I'm not a big fan of the bullit's, or of the blacked out wheel look; but if I had to decide between the two I would go with the cobra. I'm biased towards the fr500's since thats what I ended up getting.