Conor- "Live in Berlin" is pretty amazing, worth getting on CD (as are they all, more or less....
http://www.rejectedunknown.com/store/shop/music has a bunch of the early ones available on CD, try the Archive CD 5 pack.) "Frankenstein Love" is only on tape, so that's good. I'd also suggest "The Lost Recordings" 1 and 2, and "Songs of Pain," "Songs of More Pain."