Agree, Epic in 15mm would be very cool! Although personally I love the 6mm as well, the massed 'Horus Heresy' battle photos and artwork was one of the first things that got me into wargaming, and still looks pretty cool today! You want 'apocalypse'? That's the way to play...
Actually, all of the stuff I ordered has now arrived, here is a photo of all the toys!