The two I'd reccommend for a start, were mentioned already, I just wanted to confirm:
- 'Hostage' (Live in Redondo Beach 1980)
- 'Solid Citizen' Live in Hamburg, Germany 1978)
Both are full of life, contain a lot of action / interaction, but also some serious moments. Buk appeares very cool.
(only one bad thing: 'Hostage' comes as a one-track recording, which makes it hard to go for special poems to listen to.)
The reason I prefer these before 'Poems and insults' is for reasons of audio-quality only. So, if you don't mind the lack of good sound, this one's great too. (it was the San Francisco reading 1972.)
The 'Terror Street' is a fine one but of poor sound quality and has no audience-interaction since it was a home-recording as hank already stated. So, maybe you shouldn't start with this one, but have it in mind for later. If you take this one, you might like to add the 'Run with the Hunted - Uncensored' - Double-CD. It's a home-recording from short before Buk's death and thus complementary to the 'Terror Street'-rec. Both together sum up very fine, I think.