DH Vs Space Marines (Need Help)

Okay im playing a Space Marine player and think i need help, i have never fought marinesd before. I have both lists, mine and his (below) and would greatly appreciate any help anyone could give, i also PROMISE a battle report maybe even with some pics. However it might take a while to get the battle report.

Daemonhunters (me)
HQ
Brother Captain with psycannon and psyic hood=111

Troops
1 justicar with auspex and nine grey knights=277

1 justicar with auspex and nine grey knights=277

6 stormtroopers with two plasma guns=80

Heavy Support
Dreadnought with twin linked lascannon and Missile launcher=140

Dreadnought with assault cannon and Missile launcher=120

Total=1005


Space Marines (his list) [copied from word]
HQ
Master of Sanctity is equipped with a Crozius Arcanum, Bolt Pistol, a Rosarius, Terminator Honours, Artificer Armour, an Auspex and a teleport homer.
He has a Command Squad made up of:
- Sergeant with Terminator Honours and a Power Weapon and a Bolt Pistol.
- 3 Marines equipped with Terminator honours, Close Combat Weapons and Bolt Pistols.
- A Marine is a company Champion equipped with a Power Weapon, Combat Shield, Bolt Pistol and Terminator Honours.
The Entire squad has Furious Charge and is mounted in a Razorback transport.
-Cost of squad 391 points.

Elites

Terminator Squad made up of:
- A Sergeant with a Power weapon and a Storm Bolter.
-2 Terminators are equipped with Assault Cannons.
2 Terminators are equipped with Chain Fists and Storm Bolters.
-The entire squad has Tank Hunter
-Cost of squad 250 points.

Troops

Tactical squad made up of:
- A Sergeant equipped with a Bolter.
- 2 Marines equipped with Bolters.
- A Marine equipped with a Plasma Gun.
- A Marine equipped with a Plasma Cannon.
-Cost of squad 105 points.

Tactical Squad made up of:
-A Sergeant equipped with a bolter.
-2 Marines equipped with bolters.
-A Marine equipped with a Plasma Gun.
-A Marine equipped with a Plasma Cannon.
-Cost of Squad 105 points.

Heavy Support

Predator Annilator armed with a Twin-Linked Lascannon, side sponsor Lascannons, Smoke Launchers and Extra Armour.
-Cost of unit 153 points.


So those are the lists, he is slightly more experienced than i am so i will need all the help i can get.
All comments are welcome!

-Cheers!