You want a high-end virtual reality headset that handles heavy gaming without stuttering and lasts for years instead of months. Buying the right gear once means you avoid replacing obsolete hardware next year.
We should wait for the mid-cycle hardware refresh when new versions drop and older models finally go on sale. If you time it right, last year's flagship drops in price while keeping almost all the performance you actually need.
That 0% window is a deadline, not free money. If you still have a balance left when the 18 months end, you will get hit with interest on the remaining amount.