Naturel GGH is a stunning combo! but it will be quite high maintenance IMO! and its probably harder to find now too... since it was last season and from what i heard it sold out pretty quick... both naturel and black are versatile but I think black will be a more suitable choice if you're gona use it as an everyday bag or if you're rough with your bags? Black GGH of course is also very stunning combo! look at Fergie! HTH! good luck!
It all depends how often you are going to carry the bag. I have the Natural and you really have to be careful with it because it is a light color bag. If you are going to use it a lot as an every day bag i would get the Black one. Here is a picture of my Natural.