Board Thread:Skyrim/@comment-124.185.0.131-20140607034023/@comment-25091735-20140622061456

He doesn't kill everyone in Markarth. He only kills guards/NPC's that are aggresive. And the armour is worth it if you are a low level and aiming to being either in Magick or Stealth.

And the only thing Thonar gives you for killing Madanach is a stupid ring. Well, it's not really stupid. It actually has really good smithing perks.

Just choose what's morally right, because either way it's the wrong choice.