Your opinion
 

Ok so I need to know what everyone thinks. I am thinking about replacing my Stock HID headlights with projector headlights. I just don't know the pros and cons. any help would be great. I have a 2003 350z

I think that's cool...

basically I just need to know which is better. I plan on opening the old ones up and putting halos and led's in the old ones.

My opinion is you need to make a thread title that means something. ;)

Are you talking about the entire headlamp? Going to 06+ headlamps? Or are you talking about installing a proper bixenon projector inside your 03 headlamps?

If you want projector headlights get some.

The pros of the 06+ headlamps are brighter light output, HID highbeams instead of halogens, and most agree they look better.

The cons are they are expensive, and technically not the original headlamps for your 03 Z.

Stock 03 HIDs are projector headlights.

go for it! who doesn't love more xenon light output

Vague thread title is vague

That's debatable. It's more of a hybrid because there is reflector surface on the sides that is used for maybe 25% of the total light output.

Regardless, OP, you need to be more specific here.

Old people coming toward you at night.