1500 point Ideas for possible December Tournament

I got wind that since my local store relocated and now have extra room they are planning on running tournaments starting at the end of the year.

I'm keen to get some thoughts following on this wanting to put on a good show at the local venue.

There are 4 ways I could go. 3 lists I work from regularly and 1 I'm hoping to cook up by then.

1. Gun line marines - lots of long range heavy weapons, Shoot till I have an advantage and then push forward. Typical units - Drednoughts, Whirlwind, vindicator, drop pods, Predator, stern guard

Typical List

Librarain

2 x Marines w/Drop pod

3 x Dreds

2 x Vindicators

1 x Whirlwind/Thunder Fire/Predator

Top up with scouts and marines

2. Mech Marines - Marines in rhinos with tanks for support. Typical units - Marines in Rhinos, Predator, Vindicator, Razor Back, land Raider

Typical List

Terminator Librarian/Captain w/terminators in Land Raider

3 x Marines in Rhinos

top with vindicator's/predator, Scouts, land raider Redeemer with marines

3. Horde Marines - as many marines as possible on the board.

Typical List

Captain for fluff, Librarian for power

60 Tactical Marines

Then add 1-2 devestator squads

Then Assault marines

Top with upgrades.

4. The New guard list This is coming soon, Hopefully by the end of the year. At present will look like

Comand Squad

40-60 Veterans 2 chimera's

10 Storm Troopers

1-3 sentinels with Las Cannons

Leman Russ Demolisher

At the moment I'm thinking gun line with the following

1500 point Exorcist Trench Warfare Force

HQ

Librarian - Avenger, Gate of Infinity

Troops

Tactical Squad - Plasma Pistol, Plasma Gun, Multimelta, Drop Pod

Tactical Squad - Plasma Pistol, Melta Gun, Multimelta, Drop Pod

Tactical Squad - Flamer, Lascannon, Rhino

Elites

Drednought - Twin Linked Lascannon, Missile Launcher

Drednought - Twin Linked Lascannon, Missile Launcher

Drednought - 2 x Twin Linked Autocannon

Heavy Support

Vindicator

Vindicator

Predator - Auto Cannon, Heavy bolter Sponsons

Any thoughts? This may be a little over the top. The idea is the Librarian drops in with the plasma gun squad to pop rear armour, Melta gun squad comes in later to take an objective, Rhino squad with the tanks and dreds forms a fire base, Pop transports, take out key units, slow the advance.

I have no close combat and will strugle against hordes but this should be fun, If they get to me I'm screwed.