5. Rigor Mortis - Rigor Mortis

This album is killer material. Every single track, from the instrumental opener 'Welcome to Your Funeral' to the last notes of 'Die in Pain' just keeps a crushing grip on your balls, not letting go for the 41 minutes this album lasts. Every single song is a highlight, fast riffing, great vocals and solos that could very well be the definition of 'speed metal'.
Favorite tracks: Vampire, Bodily Dismemberment, Shroud of Gloom
4. Kreator - Pleasure to Kill

The only album on my list that isn't American, and it deserves it's place. Brutal riffs, evil-sounding vocals and awesome lyrics. The intro track actually confused me the first time I was listening to it, only to rape up the ass with Ripping Corpse.
Favorite tracks: Command of The Blade, Pleasure to Kill, Carrion
3. Dark Angel - Darkness Descends

What more is there to say about this legendary album? Every himself respecting thrash metal fan knows pretty much everything about Dark Angel's masterpiece, and it's pretty much all true. Classic stuff. (I lol'd when I saw a faggot on Metal archives giving it 20%, said he wasn't a 'mallcore poser', but yet has a Chimaira album at 60%)
Favorite tracks: Darkness Descends, Perish in Flames, The Burning of Sodom
2. Slayer - Show No Mercy

Yes, I included a Slayer album, and no, it isn't Reign in Blood. (Don't get me wrong, RiB is great, but Show No Mercy is simply better.)
The reason I picked this over Reign in Blood, is the guitarwork. Both the riffs and solos just seem better on this album.
Favorite tracks: Evil Has No Boundaries, The Antichrist, Black Magic
1. Morbid Saint - Spectrum of Death
Holy shit. Holy fucking shit. This album is insanely awesome. The first seconds of the album is like a sledgehammer to the face, and the rest of the album is pure unrelenting, thrashing evil, that grabs you by the throat and doesn't let go. Riffs, drums, solos, vocals, ...
Everything is beyond perfection.
Favorite tracks: All of them
Honorable mentions:
Megadeth - Rust in Peace
Sodom - Agent Orange
Metallica - Kill 'em All
Possessed - Seven Churches (death or thrash, I don't care, it's fucking great)
Ripping Corpse - Dreaming With The Dead (see Possessed)
Demolition Hammer - Epidemic of Violence. (Tortured Existence is awesome too)
Exodus- Bonded By Blood
Sadus - Chemical Exposure
Chemical Breath - Fatal Exposure (same as Ripping Corpse and Possessed)