Depends on how much highlighting you want to spend time doing.
If you want a fast paint job with no, or very little, highlighting I would tend to go with a brighter red. say GW Blood Red. For a single simple highlight I would use Blazing Orange over this.
Or for a darker Red look go with Red Gore and highlight with Blood Red.
For my own Narn I started with Red Gore, then first overall highlighted eith Blood Red followed by fine highlight of Blazing Orange and finally an edge highliight of Firey Orange, (which I see GW no longer supply) so alternatively 50:50 white / Blazing Orange.
The use a very watered down red ink wash to pull it all together.
You should really try then see what is best for you. Way back I tried a darker overall look but preferred the above. Hence some of my early painted Narn have been recently renovated.
At the end of the day it is what looks right for you