I already don't remember well :D, and haven't heard many volumes, but X Blank X "You're Full Of Shit" on Vol. 9 is awesome! (better than the Electric Eels' version.)
Vol. 9 also has Nothing-Uniformz, La Peste-Better Off Dead etc.
Vol. 5 has Nubs-Job.
And Vol. 26 (Canada) was pretty good.
So, I think Vol. 9 is worth getting!