Building a new army

[Cherub]

So with the new edition I have decided to build a new army for collection. With the limited time I have to play, I would rather build it with the idea of making a matching table and totally themed to match. I don't want to do guard as I already have a rather large guard army. I would like to do something unique and that would look amazing when its being playing with in a zone of mortalis board. Does anyone have any good ideas?

thanks

[Wolfshade]

The classic idea would be either Blood Angels or Dark Angels vs. Genestealers in the zone mortalis, think Space Hulk