Think of a mirror that you pass by every day in a room or hallway. Your reflection looks perfectly fine. But one day you bring along some cleaning spray and give the mirror a wipe, only to be taken aback by the newfound clarity and depth of the image reflected back at you. Storgårds took that proverbial bottle of Windex to Tchaikovsky’s Symphony No. 5, which dates from 1888. The results were breathtaking, mainly because of the honesty and forthrightness with which Storgårds addressed its unabashed Romanticism.