Have to add to the lists Mitch and Ajaxwarrior have stated. Great bands ands CD's mentioned there, but these are some of my choices for timeless ripp'n CD's:

Slayer - "Reign in Blood"
Sacrifice - "Forward to Termination"
Forbidden - "Forbidden Evil"
Suicidal Tendencies - self titled
Death Angel - "Act III"
Dark Angel - "Darkness Decends"
Metallica - "Master of Puppets"
Kreator - "Kill for Pleasure"
Megadeth - "Peace Sells But Who's Buying"
Armored Saint - "Delerious Nomad"
Manowar - "Hail to England"

Countless other great bands of the true metal era like Destruction, Posessed, Ludichrist, Nuclear Assault, OverKill, Exodus, Sacred Reich, Pantera, Celtic Frost, Onslaught, Cryptic Slaughter, Anthrax, Death, and Bad Brains.

Aaaaah - those were the days! I went through many sets of car speakers during my college years.

The current metal doesn't seem to have the in your face intensity like when the above bands reigned. The modern punk bands are what I think to be the best stuff you can find in CD stores now.
Mitch, you must have a punk side if the Ramones are your top band. Got some great CDs you may like from NOFX, No Use For a Name, Lagwagon, Strung Out, Rise Against, Good Riddance, Avail.

Gotta love the power of MUSIC to keep yourself sane!