My sub-$300 Sennheiser HD1 closed, over-ear, BT (w/ cable option), active noise-cancelling headphones are hands-down the best purchase I made in a decade, maybe ever. I'm not a deluded "audiophile" poseur, but I'm a musician who cares deeply about music, and a software dev / architect whose family depends on my ability to focus deeply on my work, and I wear them for about 8h/day.