Here are some technical metal bands ( progressive or jazz based ) :
- Atheist ( death-jazz, it's really good )
- Watchtower ( one of the oldest progressive metal bands. Their first cd, Energetic Disassembly, is 17 year-old and is quite good. But the vocals are kinda weird, but listen to the music ! )
- Theory In practice ( death-prog, they're ok, they haven't impressed me though, I prefer Atheist ).
- Spastic Ink ( really technical, no vocals, not many of you will like it )
- Cynic ( needless to say anything )
- Spiral Architect ( progressive metal again, the vocals mught be a little harmful for a couple of you, a nice band. )