My $0.18: (loonie's up to 90 cents! woot to shoppin' in the states!)
No offense to your taste in figures, ironwarrior333, but the foregworld upgrade pack for Renegade militia isn't, um, the best marriage of price and quality
IMHO. You get UPGRADES for other figures at the same cost as those figures? Bleah! Were I you, I'd just buy some round bases and muck around with some Marauders, Cadians/Catachans - huge arms look pretty Khornesque to me - maybe a few Warriors for obviously Chaotic Assault armour, and the Chaos mutation sprue - you could practically do the whole thing out of boxes, especially if you bought it all before assembling. If you just want face masks, you can just model them on - if they look a little crude, well, do you suppose the basic troops get artisan treatment for their facewear? Maybe grab some Redemptionists to chop up into leaders/use headswops from Chaos Warriors - guys with a sack over their head just don't look particularly special to me.
On the other hand, if you're really wanting to give some money to forge world and don't mind a slightly more uniform look, why not do a company of Traitor Kriegsmen recently sworn to the Pact? Yeah, they're incedibly expensive, but unlike the upgrade pact you actually get bloody amazing models that you COULD NOT - unless you're an accomplished amateur sculpter - hope to replicate with basic
GW products and greenstuff.
Thos two links look pretty interesting - Death Brigades look like they would be a waste of points as proper Elites, frankly. 11 points for a guy with a 5+ save is stiff enough before you throw in for veterans skills, carapace armour, the requisite ten points to MAKE them elite in the first place - bleah, why not just be satisfied with the potential to run a few pie plates as troops? Even paying a twenty point penalty per unit as compared to a comparable
IG unit, demo charges are still massively nasty, and with six troops slots you wouldn't have to cut too far into your mutant mobs/lascannon teams to take a few. I GUESS if you're running a very troops heavy list all ready - which due to your list it doesn't seem - that the extra ten MIGHT be worth it to put them in elites if you found a certain setup that really, really worked well, but these guys are Troops Traitor Demo Squads, plain and simple. They're called the Death Brigade and they should be a sacrificial unit bent on bringing down their points in kills rather than surviving the battle. A 30 point squad with a 35 point bomb.
The Loxatl rules look like they could be some fun - hmm, Beasts AND Pinning AND Rending? They have some very cool tactical potential, even if they'll die like expensive dogs to missiles and powerfists. Still, with I5 4A S4 on the charge, they could rough up and lock a dedicated shooting squad reasonably easily, and Stealth somewhat improves their usefulness in Cityfight. No cheap and cheerful Rough Riders, these, but I'd try them out if you're doing a conversion anyways.
Genestealers are a leetle too small for big mutants,
IMHO - and they're troops with I6, so representing low I fat guys is kind of like trying to get Freddy Krueger to sub in for Jason Voorhees. You could spend some of the money you saved on not shelling out for the upgrade packs on some plastic Ogres - a little common but easy to convert - or, if you don't mind messing around with green stuff and crazy glue, Fantasy Trolls might look pretty good - just give them any old large gun and a few spikes and you have some suitably oversized versions of those Necromundan Scalies that ran around with the Scavvies in that game's expansion set.
On the Chaos Marine allies front, I'd suspect bikes and/or Raptors might work for the role you want - mobile attack - though both are expensive units and I am extremely unfamiliar with the Chaos list.
Hopefully this was somewhat helpful.
@Orlock: Welcome!...also your grammar isn't that bad. Sentence fragments and smilies are par for the course on message boards - start using numbers in the place of letters and deliberately mispelling words, however, and we will have to track you, punch you in the goolies and steal your miniatures.