What about Warbringer? I think they played before Angra. If I am going to see a show for one band I get there one hour before doors so I don't feel like a king size douche afterward. I am sorry to hammer on your friends, but Angra doesn't tour the states every year.
I have seen Sepultura twice with the current line-up. I think they sound good and I liked both shows, but going from two guitars to one is tough live.
" Capitalist by Day, Anarchist by night! "