Iron Maiden's "Seventh Son of a Seventh Son": Every song on the album eloquently tells part of a rather interesting story about the seventh son of a seventh son, the protagonist of the concept album and does a fantastic job of setting the atmosphere with the use of Bruce's vocals and synthesizers. To top it of, every single song on the album is an absolute pleasure to listen to. Megadeth's "Rust in Peace": Nothing but amazing songs full of amazing riffs and solos. Despite being insanely fast and technical the songs manage to find melody. Marty is an amazing guitarist, the best Megadeth has ever had and ever will have, one of the best out there. Megadeth's "Peace Sells... But Who's Buying": Love the dark, punky mood the album sets, the jazzy guitar work courtesy of Chris Poland, and Megadeth's trademark speed. This album, while not quite as technical as "Rust in Peace", is much more aggressive. Metallica's "Master of Puppets": The album that really introduced me to metal. Fantastic riffs and drumming, made all the better by Cliff Burton's writing and bass. Metallica's "Ride the Lightning" For most of the same reasons that "Master of Puppets" is awesome. Now I don't believe that there is such a thing as a "flawless album", however I believe the above mentioned albums come damn close. There are other albums I could mention but these are five off the top of my head. And yes, I did get lazy typing around the end.