Guns N' Roses' 1987 debut album Appetite for Destruction changed history. Unlike anything else of its time, the music was primal and gritty, defined by a solid, hard, bluesy base and dark, sleazy, dirty, and honest themes.
Rust in Peace is a thrash classic, and easily Megadeth's best album. It features Megadeth at their best, with technical riffing, very impressive shredding and soloing, and some nice bass work.