I like both Dark Crusade and certain parts of DoW II the most. Dark Crusade had a very immerseive quality and was fun at the same time. DoW II have some very good game play, though the constant cover humping was annoying, but lacked a certain amount of atmosphere that made it a 40k game. And I yet to see a Epic scale 40k RTS, which is what I really want. A few squads of tyranids are cool and all but I never got that swarmy feeling.