Im kind of in the same boat as you, here are some pics of both options. My problem is that I have chrome wheels so I dont know if I should keep the chrome grille to compliment them.

 

a few more..

 

Where did you guys, that did, buy a midnight grille? I was trying to find one for my 2008 G35 Sedan......

 

It's the stock grille, you paint it and leave the top and bottom bar unpainted

 

It's the stock grille, you paint it and leave the top and bottom bar unpainted

 

I did mine this way. It took about 5 hours including drying time allowed between the 4 coats applied.
http://gshack.org/?p=196

 

I know this is a little old, but I thought I would add my two cents.

I am in the process of option B (blacking out the whole grille with the exception of the Mt Fuji logo). I decided to get a 2nd grille from the community to be the one I painted, much cheaper than getting it from a dealer. This way if I decide at some point that I don't like the look anymore, I can switch back to my original grille.