The pleasures to be had from a performance of Verdi's Attila are a unique blend: one third Macbeth, one third Nabucco, and one third summer-camp hayride. The staging of San Francisco Opera's ultimately satisfying revival occasionally reaches ill-advisedly towards something more sophisticated. When it does (i.e. all of Act III), um...er... one must close one's eyes and think of Italy, because the visual results are mind-bogglingly annoying and meaningless. Happily, the exhilaration of this early Verdian work — led with commitment and panache by SFO music director Nicola Luisotti — transcends the needless awkwardness of the staging. Attila isn't the most memorable score in the world, but it is pure, if unrefined, Italian opera. It allows singers to strut their stuff, to sing and emote with extravagance, and it makes for a great “coming attractions” reel for the masterpieces Verdi had yet to compose.