i have a DP sedan im thinking of putting on my roof spoiler should i color match it or paint the roof spoiler black since i am gonna get a black roof eventually.

 

I have a roof spoiler on my G35 and I have a BS FX with the factory black spoiler so i think I can give you a pretty good opinion...

I wouldn't get a roof spoiler given your future plans of getting your roof painted black.

The DG roof spoiler just won't work with the black roof and having a black roof spoiler with a black roof just seems like overkill.
My 2 cents...

 

Color match it if you must get it now and paint it black when you get the roof done.