I'll ditto on Slayer. Also, all Scorpions up to Love Drive album (w/M.Schenker) and all Judas Priest through Hell Bent For Leather for older metal. I regularly request Dissident Aggressor by Priest on our local radio station, but always get the answer "Not a chance!" What a bunch of weenies... I consider Zep & Deep Purple more hard rock than metal, in my mind anyway, and could not do without Deep Purple. And then there is UFO, Iron Maiden, Saxon, Riot ... Oh hell, they are ALL the best!