It's not that I dislike IV's. I think the Reverend has IV's wich sound great. I like the sound that some players get with the SD Alnico II Pro's.
I also liked the sound of the Crawlers better than the Mules in the soundclips. Maybe 'better' isn't the correct word here, it's a matter of personal taste, we all hear things differently. Also, I have a somewhat midrangy amp, so I feel that V's go better with it.
Kinda hard to explain isn't it. Doesn't Angus use Alnico II's as well? He has an awesome tone but I think that's mostly the amp.