Oh, I think I finally get it. Sven doesn't recommend Dark Urge as a first playthrough because he assumes most people will want to play it because of the insane murderous psychopath route. I guess if you kill most of your companions, you're really missing out on a big part of the story, so it makes perfect sense. But if you don't plan on giving in to darkness, then Urge is definitely a better option than Tav, especially because of the extra content.
