I liked the McDowell cameo in Snuff. And looking at the lyrics after years of not having done so, they're not that bad, I guess certain vocal choices Corey made in the first part were a bit creepy to me, and I let that influence my thoughts on part 2 having not heard it in forever. Ironically, that first part is one of my favorite songs because of those vocals, and I really like when it gets to around the middle and he starts yelling. What that says of me, I do not know.
I want to say I've heard the Opeth song before, but I'll look it up to make sure.