In a shallow dish, combine the first 8 ingredients. Add the steaks and turn to coat. Cover; refrigerate overnight., Drain and discard marinade. Combine the steak seasonings; sprinkle over steaks., Grill steaks, covered, over medium heat or broil 3-4 in. from the heat until meat reaches desired doneness (for medium-rare, a thermometer should read 135°; medium, 140°; medium-well, 145°), 5-7 minutes on each side., For herb butter, in a small bowl, beat the butter, parsley and horseradish until blended. Spoon 1 tablespoon herb butter over each steak.