Hi Dark Apostle and welcome to the land of
Dak Dak!
4000+ pts of space marines? Thinking of starting Word Bearers...? Both sound awesome - you'll have to show us some pics.
If you're interested in playing some narrative campaigns set in 30k or
40k, then check out Animosity Events:
http://www.animosity40k.proboards.com
The next event involves lots of zombies...
Laters!