Chaos Space Marines...where to now?

?++Next steps++Next steps++?

I posted a modified version of this post over on a 40K group on Google+ today, as I'm looking for some advice on where to go next with my small warband of Chaos Space Marines. If you have any advice feel free to chip in!

"Can I get done advice from any Chaos Space Marine players out there?

Took a look through my dusty case of Chaos Warrior odds and ends today...
...This is what I have, both painted and unpainted.

Heavy weapons.

• X1 Dude with autocannon.(unpainted)
• X2 with rocket launchers.(unpainted)
• X4 guys with lascannons.(unpainted)

Infantry

• X15 guys with close combat weapons (unpainted)
• X2 melta guns (unpainted)
• X2 flamers (unpainted)
• X2 plasma guns (unpainted)
• X2 heavy bolters (unpainted)
• X14 CSMs with bolters (a couple of whom look like sergeants with pistol and power swords)
• X8 CSMs with chainswords
• X1 captain (?)

Vehicles

• X1 Rhino.
• X1 Defiler

Combine this with the Crimson Slaughter expansion kit I picked up http://chatteringhorde.blogspot.jp/2017/01/holiday-haul-of-chaos.html and I'll have a very infantry heavy force. If you don't know, it contains:

x1 Chaos Land Raider

x5 Chaos Space Marine Terminators

x5 Raptors/ Talons

x5 Chaos Cultists

Any advice on putting together a fun, fluffy force from these? (Photos below)

Autocannon (?)

x2 Rocket Launchers

x4 Lascannons

x15 Close combat weapons (Khorne berserkers?)

Chaos Metal Box (Rhino!)

x2 Melta guns

x2 heavy bolt guns

x2 Plasma guns

x2 Flamers

x6 Bolters and sergeant (plasma pistol and Power sword?)

Captain?

x9 CSMs with chainswords

x2 CSM bikers

x6 CSMs with bolters and Sergeant (powersword)

Thanks!