Too Normal map, or not too normla map, that is the question!

I've been playign with normal maps on top of my displacmenet, maps, and heres what i've got.

The picture bleow is without a normal map.
Using a basic render, no new lights etc.

The picture below this is with the normal map ontop of the displacrement.

I think that witht he normla maps, adds some of the nicer fine, detail in the sculpt, and hardly chnages the render tiem at all.