For the short time I owned a 20th Anny Shiva, I used it for Thrash---->Death metal. It will easily do modern/alternative/prog metal from a gain/eq standpoint. Whether or not the voicing fits for those styles is up to your personal tastes.
KICK ASS AMP

Only sold mine cause I got an Uber Rev blue and a Wizard MCII, and both those amps fit my style much better.