Also, I would say "Watershed" is pretty raw (or about as raw as I'd want for them), and the rhythms on that are a JVM through a Recto cab...
Jesus Joe, what guitars and amps HAVEN'T you owned at some point?
You didn't like the soundcity? I'm loving my 100 watter!
http://www.metalkult.com/in-the-studio/mastodon-skye/ check studio report from them
I also want to point out how BADASS that Rasputin shirt is. DO WANT.