Black Marines and Dark Marines?

With a busy Christmas over workwise and my wife having taken over use of the xbox and the new games 'we' got, its time to get focused back on some hobby projects.

I received my little box o goodness from Forge World today containing the 10 sets of mark IV armour and a pack of Umbra pattern bolters. Now these are of course for the Horus Heresy project and should be destined to be Raven Guard in the process of having the crap kicked out of them by Traitor forces, who I might add seem all the rage with other participants of the project... poor outnumbered loyalists...

Well in addition to this we have the new Dark Angel codex being released in less than a fortnight and fingers crossed, it has some competitive punch from Mr Skaven/Ogre Kingdom Vetock. Now I know some other vocal NZ gamers do not like the new DA range but I frakkin love it. The look is similar to what I was working towards with Cody's Grey Knights with personal heraldry and extra details on the armour. The new DA kits can take this to another level of gothic 'space knight' imagery.

I have the very nice DA models from Dark Vengeance and have used them in the narrative campaign but now I have some little choices to make. I would have prefered to paint the Dark Angels in a preheresy colour scheme as I dont like the traditional dark green at all. However as I was going to play Raven Guard for 30k I dont want to be working on 2 black marine armies. Looking at successor chapters I like the Guardians of the Convenant the most, however I will darken the metal armour considerably similar the Grey Knights I have already worked on.

So do I paint my DA as Guardians of the Convenant and stay with ninja Raven Guard for Horus Heresy or roll it all into one and have a combined pre heresy Dark Angel force good for both systems? I do think they can both function fine as seperate armies and the Raven Guard can always be a vanilla marine army for 40k.