Hmm, as for metal bands that I can think of at the moment, for example
Carcass
Arch enemy
Meshuggah
Megadeth (Rust in piece, one of the best albums ever imho)
newest Children of Bodom
Emperor
Arcturus (Aspera hiems symfonia)
Strapping young lad's new album. even though it's pretty weird stuff
Sepultura...
Oh, I guess I mentioned it earlier in this thread, but Jason Becker & Marty Friedman's Cacophony is real shredding madness. And their soloalbums. I dig them a lot.