Updated list with little tweaks. Basically the same but changed the captain, transport, and some vehicle options so I can squeeze in a Land Speeder. If I had the models ready I'd go with a chaplain and side guns on the predator but I'm not going to have them ready in time.
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1500 Pts - Codex: Space Marines Roster - Obsidian Fists - 1500
HQ: Space Marine Captain in Power Armour (1#, 140 pts)
1 Space Marine Captain in Power Armour, 140 pts (Unit Type: Infantry; Frag Grenades; Krak Grenades; Iron Halo; Digital Weapons; Artificer Armour; Bolt Pistol; Power Weapon x1; And They Shall Know No Fear; Combat Tactics; Independent Character)
Elite: Terminator Squad (5#, 205 pts)
4 Terminator Squad, 205 pts ((C:SM, pg. 64 & 136); Unit Type: Infantry; Power Fist x4; Storm Bolter x3; Heavy Flamer; And They Shall Know No Fear; Combat Squads; Combat Tactics)
1 Sergeant (Unit Type: Infantry; Power Weapon; Storm Bolter; And They Shall Know No Fear; Combat Squads; Combat Tactics)
Elite: Dreadnought (1#, 115 pts)
1 Dreadnought, 115 pts ((C:SM, pg. 65 & 137); Unit Type: Vehicle (Walker); Searchlight; Smoke Launchers; Dreadnought CCW; Multi-melta; Heavy Flamer)
Troops: Tactical Squad (11#, 230 pts)
9 Tactical Squad - WHITE, 230 pts ((C:SM, pg. 59 & 134); Unit Type: Infantry; Frag Grenades; Krak Grenades; Power Armour; Bolt Pistol x9; Bolter x7; Flamer; Missile Launcher; And They Shall Know No Fear; Combat Squads; Combat Tactics)
1 Sergeant (Unit Type: Infantry; Frag Grenades; Krak Grenades; Power Armour; Bolt Pistol; Power Fist x1; And They Shall Know No Fear; Combat Squads; Combat Tactics)
1 Rhino (Unit Type: Vehicle (Tank); Transport Capacity: 10 models; Access Points: 3; Fire Points: 1; Searchlight; Smoke Launchers; Storm Bolter; Repair)
Troops: Tactical Squad (10#, 185 pts)
9 Tactical Squad - RED, 185 pts ((C:SM, pg. 59 & 134); Unit Type: Infantry; Frag Grenades; Krak Grenades; Power Armour; Bolt Pistol x9; Bolter x7; Flamer; Lascannon; And They Shall Know No Fear; Combat Squads; Combat Tactics)
1 Sergeant (Unit Type: Infantry; Frag Grenades; Krak Grenades; Power Armour; Melta Bombs; Bolt Pistol; Chainsword x1; And They Shall Know No Fear; Combat Squads; Combat Tactics)
Troops: Scout Squad (10#, 170 pts)
9 Scout Squad, 170 pts ((C:SM, pg. 66 & 134); Unit Type: Infantry; Frag Grenades; Krak Grenades; Scout Armour; Bolt Pistol x9; Shotgun x4; Sniper Rifle x4; Heavy Bolter w/Hellfire Shells; And They Shall Know No Fear; Combat Squads; Combat Tactics; Infiltrate; Move Through Cover; Scouts)
1 Sergeant (Unit Type: Infantry; Frag Grenades; Krak Grenades; Scout Armour; Melta Bombs; Bolt Pistol; Power Weapon x1; And They Shall Know No Fear; Combat Squads; Combat Tactics; Infiltrate; Move Through Cover; Scouts)
Fast Attack: Land Speeder Squadron (1#, 60 pts)
1 Land Speeder Squadron, 60 pts ((C:SM, pg. 74 & 139); Unit Type: Vehicle (Skimmer, Fast); Multi-melta x1; Deep Strike)
Fast Attack: Land Speeder Storm (1#, 85 pts)
1 Land Speeder Storm, 85 pts ((C:SM, pg. 75 & 141); Unit Type: Vehicle (Open-topped); Unit Type: Vehicle (Skimmer, Fast); Transport Capacity: 5 models; Cerberus Launcher; Jamming Beacon; Assault Cannon; Deep Strike; Scouts)
Heavy Support: Predator (1#, 60 pts)
1 Predator, 60 pts ((C:SM, pg. 78 & 143); Unit Type: Vehicle (Tank); Searchlight; Smoke Launchers; Autocannon)
Heavy Support: Land Raider (1#, 250 pts)
1 Land Raider, 250 pts ((C:SM, pg. 81 & 142); Unit Type: Vehicle (Tank); Transport Capacity: 12 models; Access Points: 3; Searchlight; Smoke Launchers; 2x Twin Linked Lascannons; Twin-Linked Heavy Bolter; Assault Vehicle; Power of the Machine Spirit)