I'm a fan of their material, though it can be somewhat hit and miss. The mind is a terrible thing to taste is probably my favorite album...it is a good combination of their techno sound of the earlier albums and the industrial sound of their later albums. Psalm 69 is also a great album. The land of rape and honey is great as well...Hizbollah is possibly my favorite track from them.
But, other than those three albums, they seem to release albums with a lot of mediocre tracks and 1-3 great ones. Rio Grande Blood is probably the best album other than the three mentioned, but it still has this problem.
Though it is a live album, In case you didn't feel like showing up is excellent.