While you're about it make Skullcrusher one of those Heralds. those 4+rending attacks will do for any terminators he encounters....
Anyway, I'm not sure how my Emperors Children will play out, looks like Noise Marines are getting Salvo weapons (which I suspected the second I saw the rule in the BRB) so a lot depends on how many shots they get and what sort of potency they have.
MvS' stellar Chaos Legion Fandexes have happily reconciled me with an EC's army that isn't entirely composed of Noise Marines though, so I'll be experimenting with the Non-Raptor Jump Packers, Bikers and a few of the gnarly things it sounds like CSM's are getting. A long discussion about Chaos Dreadnoughts and Slaanesh Champions had some time ago on the Background forum has me hankering to do a Slaaneshi Dread. Noise Marine version if possible, but not necessary.
I've had the design for a Lord on a Bike in my head for some time too, so I'm definitely going to look at a Biker Contingent (it helps that Bikes are pretty solid in 6th).
So, in short, as long as it's feasibly Emperor's Children or notably Slaanesh oriented, it's a contender, this army may well be the one that keeps growing long past any useful size.