HQ:

Chaos Lord With A Deamon Weapon And Melta Bombs.

Troops:

12 Marines With An Icon Of Chaos Glory, 2 Melta Guns.

12 Marines With An Icon Of Chaos Glory, 2 Melta Guns.

12 Marines With An Icon Of Chaos Glory, 2 Melta Guns.

12 Marines With An Icon Of Chaos Glory, 2 Melta Guns.

12 Marines With An Icon Of Chaos Glory, 2 Plasma Guns.

12 Marines With An Icon Of Chaos Glory, 2 Plasma Guns.

Heavy Support:

5 Havocs With An Icon Of Chaos Glory.

Total 1500 points, 78 Marines.

I plan to build and paint this army.

C&C appreciated.

Is this meant to be a pre-Heresy force, or during the Heresy?

That's a lot of Marines so should be good to grab objectives. Do your Havocs have no heavy weapons on purpose? My only comments would be that you've not got any long-range firepower in there, or any transports, so a faster or more long-range army could cause you problems.

Its going to be set pre heresy. The icons will be represented by banners that have the eye of horus on them and thunderbolts.
The havocs have no heavy weapons on purpose because they'll be walking-talking wounds for the force commander.
The speed issue isn't anything that Is making me worry, the new running rule is a nice way to compensate for the lack of transports I have. Also it'll be nice to play with a slower army for once, I've been playing 1500 point games with an úber fast blood angels turn 1 combat face eating army of doom.

So far I've managed to build nearly 2 whole marines, just need to get some green stuff on one of them to give the feet toes.