Which U2-stuff would you carry with you to an isolated island? One album, one bootleg and one more-indefinited-stuff allowed.
Album - Achtung Baby (finally I found the right way! Even Better Than The Joshua Thing!)
Bootleg - 1993-11-27 Sydney or 1993-08-28 Dublin... I can't really decide. I probably would die if i have to choose one...

Indefinited stuff - U2 by U2
And what 'bout you?