I didn't know you could make a squad less than 5 marines, cause your Death Company has only 4 marines...or was that a typo?
Also, the Missile Launcher on the Tactical Squad, I would drop for a normal Bolter, due to the fact that the whole squad has to stand still for it to be useful. Unless you're going to Combat squad, which isn't really a good idea either as it just makes them easier to kill.
For more anti-armor ability drop a Predator and make the other Predator have either 2 side sponsa Las-Cannons, or a Main hull twin Linked Las-Cannon.
You could have both on the other Predator, but that would make it a pure armor defeating machine, which is good but not if your opponent only has a couple tanks/high armor vehicles. Just my thoughts.
@phantommaster: The Furisio Dread is alot of fun, but after dropping in or lasting to get into
CC, mine usually takes a dirt nap, cause it gets shot to death.