you should ALL buy em, simple as this, especially the albums since the 4th dimension
I would begin buy :
the final Chapter (total masterpiece)
then Abducted
then 4th dimension, Catch 22 and into the abyss
and also get Nightmare made flesh from Bloodbath!!!
its Peter Tagtgren (Hypocrisy's singer and guitars) on the vocals for this album, and it fucking kicks asses!!!