Andarius's Death Watch Strike Force 2000 points

Good evening once again. They say that variety is the spice of life and for the last month or so I've gained an interest in the ordo xenos. After some careful thought I've considered making a deathwatch army to parallel my Grey knights, which has led to THIS list.

HQ
Deathwatch Watch Captain
Xenophase Sword
Dominus Aegis
Melta Bombs
145 points

Elites
Deathwatch Terminators (5 man)
5x assault cannons

Deathwatch Dreadnought
Assault Cannon
Heavy Flamer

Deathwatch Dreadnought
Assault Cannon
Heavy flamer
540 points

Troops
Death Watch Veterans (10 man)
2x Frag Cannons
Rhino

Death Watch Veterans (10 man)
2x Frag Cannons
Rhino

Death Watch Veterans (10 man)
8x shotguns
2x Frag Cannons
880 points

Fast
Deathwatch Bike Squad (5 man)
5x Power weapons
Teleport homer
185 points

Heavy
Landraider Crusader
250 points

2000 points total

VERY similar to my 2000 point grey knight force it of course is geared towards mid-ranged firepower over close combat assault. The frag-cannons and assault cannons are nasty in tandem with each other and the extra armor from the crusader and rhinos will give my opponent something to waste their shots on while facing the rest of my forces. The captain will be paired with the shotgun armed squad and placed in the Land Raider. The closest thing to an assault squad in my army apart from the bikes.

again ... few anti-flyers gear
why the shotguns ?
Aubec