I will definitely be catching the Cleveland show. While I'm not a huge fan of Watain's releases, they are definitely solid (but I think the hype is possibly a little overstated) and are said to be devastating live. I can't wait.
ive never heard watain or nactmystium. i have heard angelcorpse's the inexorable. it's one of those where youll say "yeah these dudes can play" and then never listen to it again.
I'm still a complete n00b when it comes to Watain and Nachtmystium. All I know is that they're hyped a hellavulot and I'm not sure if I see where that hype comes from yet.