8 CSMs with a Meltagun and Rhino are 165. Also, you don't have any icons to summon the demons to.Chaos marines are never going to feel right in 500pts. You will be outnumbered. Perhaps this is the solution though...
Daemon Prince - 130
x5 Khorne Bezerkers- 140
x8 Chaos Space Marines -205
5 summoned deamons
Use the meltagun or the deamonprince for what little armour there will be and close combat everything else!
I like this:8 CSMs with a Meltagun and Rhino are 165. Also, you don't have any icons to summon the demons to.
Hes right you know... lolI like this:
Daemon Prince, Wings
6 CSM with rhino, melta
5 noise marines, 4 SBs, Blastermaster
Two great mobile threats, two dangerous units for a dangerous firebase. Looks killer.