Thanks for helping decipher it, your right it does say "Steve Reich y bcn216" right under the L’Auditori heading. The one night ticket is E60, and flights (Fri Out, Sun Rtn) from stanstead about the same.... Tempting..
edit: It's even more tempting because before xmas I was looking at Stansted flights trying to figure out if I could treat myself to a random euro city weekend away in 2011. I was seperately wondering when I might also get the chance to see Underworld again. Seems natural to combine the two