Most cost-effective Noise Marines?

[Zephaniah Adriyen]

What would be the most cost-effective units (money-wise) to base my Noise Marines off of, using GW's official upgrade packs for them? I'm wanting to run an Emperor's Children army with the repro classic Noise Marine as a Chaos Lord (maybe have the guitar as a combi-flamer counts-as, like Mad Max?) and decent amounts of Noise Marines decked out with sonic weapons ONLY. (I'm not actually expecting to get much in the way of Noise Marines up and running, because they're expensive points-wise, especially fully decked out with the best speaker system in the universe.) Maybe a Rhino or two for armor, but it'll be mostly Noise Marines. Also, I've read that it's actually legal to have a Noise Champion decked out with a Doom Siren, a Sonic Blaster and a combi-bolter all at once and shoot them all in one turn? Can someone confirm?

 

Edit: I wrote up a Noise Marine list (like, specifically Noise Marines) and I can fit 40 of them in with one Chaos Lord.

Edit again: Oh, dear lord, Noise Marine upgrades are expensive, especially in large amounts like that. Yeesh. Uh. Not sure if I'll be doing Noise Marines after all lol. Still curious to find the answer.

[NovemberIX]

While it's not as varied as the GW upgrade set, Kromlech does a four pack of "sonic guns" https://bitsofwar.com/home/839-bedlam-fraternity-sonic-guns.html, combine with the old-style of chaos marine legs, torso, heads and packs that can be found cheap on eBay sooner than later and I'd say you're ready to rock pretty quickly and cheaply. I'm willing to bet if you used MKIII or MKIV stuff you might be able to go even cheaper, might make painting crazy patterns on the armor a little easier too.

[Zephaniah Adriyen]

Perhaps. Thank you for responding!