impossible to pick one but here are some of the ones that i listen to a lot lately are:
nothing else matters by metallica
the unforgiven III by metallica
fade to black by metallica
knights of cydonia by muse
resurrection by fear factory
welcome to the machine by pink floyd
schism by tool
46 & 2 by tool
the trance is the motion by static-x
lonely soul by unkle
who am i?(animatrix edit) by peace orchestra
i would put a system of a down song up there but they are one of those bands that i pretty much like every song atleast somewhat and i cant say which i like better. im real picky with my music so there are very few bands i can say that about. there are very few full albums that i have on my computer.