Well that doesn't surprise me since you did say earlier that you didn't care much for the screaming whereas I enjoy screaming and growling along with clean singing

If you can stomach the vocals, they have some great guitar and drum work. One band you should definitely check out is Dream Theater. They are by far the most accomplished musicians and they're not as mainstream as they should get credit for. Each band member is a Maestro [sp?] in the music field and the lead singer [if I remember correctly] has had voice training in classical opera. Granted he doesn't really sing like that in the band but they're awesome none the less.