I've found that Seraphim Sepia is a bit too bright for shading red, and have had more success with Agrax Earthshade. Having a darker shade gives a lot more definition to the armour
Will you be doing edge highlights? For Eldar models, the edge highlighting really pays off for the armour definition, but takes a long time as the models have a lot of armour plates and edges.
Your work so far looks great! Can't wait to see the whole army fully painted up!
[Hyarion] Warning! Loran may cause addiction to mindless online games.