There's also the "official" Dark Heresy trilogy (third book isn't out yet) by Sandy Mitchell, starting with Scourge the Heretic. They're pretty entertaining, but not as good as Eisonhorn and Ravenor.
But, yes, Dark Heresy is great. Great use of the setting, fun combat, and really awesome critical tables.
Oh, and if the psyker tries to use their powers, shoot them. It's for your own good.