Hey I've actually always had the same question about my truck, I'm actually leaning towards keeping them black as well. Thx.

 

looks nice as is...

 

i probably wouldnt try to paint the headlights. i remember someone doing that and ended up melting them lol. but if you leave the fenders black, you definitely need to get some more black to match.

 

You just have to watch the headlights when you heat them up.
Leave the fender flares black, and you should get a black bull bar for your truck. I saw a truck today that was red with the sport bumper, and a black bull bar. Looked completely sick from the front. You should get one for your truck.