Have to go with Crystavox on this one, no doubt!
They had two releases, the first being self-titled which had a solid hard rock sound and decent lyrics. The second, "Crystavox II - The Bottom Line", was a definite step up in sound, quality and heaviness! The lyrics on this one were also more thought provoking as opposed to the tried-and-true common cliches. Definitely one of my top 10!