I would personally go with the Greddy header. The stainless steel will last longer and look better than the DC sport ceramic header.

Either one will produce a lot of heat but I don't think it would be enough to scorch a hood. My turbo manifold, on the other hand, has changed the color of my paint on the hood because of the intense heat. If worse comes to worse, you could always get some reflective heat shielding to put underneath the hood or wrap the header to prevent any paint discoloration. I don't think it will be a problem though.