(Legion 4 @ Feb. 19 2007,02:11)
QUOTE
I just keep the 4 different old CSMs as separate powers, Khorne, Nurgle, etc. ... and the new CSMs as Undivided ... ?I don't use any SM Mk.6 & 7s with my CSM. ?I have 5 Bns of Traitors from the Heresy, and they are 6s & 7s. ?Interesting note, in SM1, Traitor and CSM forces could be allied ! ?So interesting possibilities there. But we never played a game with them as allied. ?Don't know why ? ?

Sigh, if only my collection were so grand and far reaching...
L4 I become more envious of you every day. 
So, anyway. Thanks for the advise. I'll probably try several of the suggestions (on spare figs I won't mind ruining) and see what I like best.
I think I'll cheat a bit and make one of my 2 marine chapters similar to Iron Warriors colors, the other Word Bearers. That way they can stand in if I want them to.
My actual Chaos undivided legion (new fat boys) will probably be either Alpha Legion or Night Lords. So hard to decide!
If anyone else has any good Chaosy advise they'd like to share, just post it here.