In response to blue's asking about the Pantera tone. I have both the MI Audio Tube Zone and the Krank Distortus Maximus pedals.
Short of buying a Krank amp, the Distortus Maximus is an evil pedal. High gain, modern gain voicing and extremely tight. Perfect for modern metal, think damageplan to trivium sounds. However, i must say there are 2 things to note. It's a 1-trick pony, you probably won't use it for anything else 'cept high-gain applications. Secondly, you have to play it pretty loud to appreciate it. For bedroom use, it's not ideal but usable. All in all, it is one serious distortion pedal.
As for the MI Audio Tube Zone, i guess sub has said what needs to be said. It's good but comparing that to the Krank, the only glaring difference is the TZ is not as tight even with the character knob all the way anti-clockwise. But a T.screamer in front of it solves the problem. Other than that i would say the TZ is much more versatile in all ways.
I play solely metal and this may be my biased take on the above 2 pedals, but i have gone through many high gain units to provide at least the above 2cents.