Winter Warm Up 1850pt 40k Tournament

[Nick1988]

I'm either looking at.........

Captain Lysander 230
Chapter Master: Space Marine bike; storm shield. 165

10 Tactical Marines 140
8 Space Marine Bikers: Attack Bike (multi-melta); meltagun; plasma gun. 248

6 Devastator Centurions: Centurion Sergeant (omniscope); 3× twin-linked lascannon; 3× grav-cannon and grav-amp; 6× missile launcher. 560

Chief Librarian Tigurius 165

10 Tactical Marines 140

Stormraven Gunship: twin-linked multi-melta. 200

1,848 points

Or.........

Captain Lysander 230

10 Tactical Marines: flamer. 145
10 Tactical Marines 140

5 Devastator Centurions: Centurion Sergeant (omniscope); 2× twin-linked lascannon; 3× grav-cannon and grav-amp; 5× missile launcher. 470
4 Devastator Centurions: 4× twin-linked lascannon; 4× missile launcher. 370

Chief Librarian Tigurius 165

10 Scouts: camo cloaks. 130

Stormraven Gunship: twin-linked multi-melta. 200

1,850 points

Or finally

Captain Lysander 230

10 Tactical Marines: meltagun. 150
10 Tactical Marines: meltagun. 150
10 Tactical Marines: meltagun. 150

5 Devastator Centurions: Centurion Sergeant (omniscope); 5× twin-linked lascannon; 5× missile launcher. 470
5 Devastator Centurions: Centurion Sergeant (omniscope); 5× grav-cannon and grav-amp; 5× missile launcher. 470

Chief Librarian Tigurius 165

5 Scouts: camo cloaks. 65

1,850 points

I know they're all sort of similar but the differences could be massive in terms of how it actually plays! Any thoughts guys?