Symphony X
Symphony X is a band that takes the progressive stylings of Dream Theater, blends in a ton of classical references and influence, and pushes it all out with a heavier guitar driven metal sound. At times sounding like Pantera, and at others like a classic italian Opera, they are a very difficult band to categorize. If you are looking for a heavy metal sound, but with well orchestrated parts, and melodic vocals, then this is your band.