Mozart’s final masterpiece is the most produced opera in the world. Three months after West Edge Opera creates its own take on it, San Francisco Opera premieres Jun Kaneko’s new English language production. SFO mates the fine voices and most appealing presences of Heidi Stober and Nathan Gunn with the gifts of several award-winning younger singers, including former Merolini Alek Shrader and Nathaniel Peake (alternating as Tamino), and hot coloratura Albina Shagimuratova (as the evil Queen).