Good over-ear noise-canceling headphones aren't just for flights. They are for open offices, loud commutes, and focusing when your living room gets chaotic. A solid pair will easily last you four to five years if you swap the ear pads once or twice, so buy for the long haul instead of settling for cheap pairs you replace every year.
Audio brands work on two-year release cycles, which gives us an edge. When a flagship gets an update, the previous version usually drops by $50 to $100 while offering roughly 95% of the same sound and comfort. If you time the purchase right, you can snag premium audio for around $400 or less without feeling the hit all at once.
The 15-month window is a hard deadline, not free money. If you still carry a balance when that promotional period ends, standard interest applies to whatever remains. Set up an automatic monthly payment of at least $27 from day one so the balance hits zero well before the intro rate expires.