Clip on over-ear headphones, similar to the Rift's.
Sebastian Kurz commented
This would be really good. Currently the only solution is to use really external headphones, which is an additional thing you have to attach again and again. If the headphones would be already pre-mounted and easy to activate "on demand", this would be a thing.
Great idea Lex, would love to see clip-on headphones with a style like that of the Rift's or the Valve Index. This would be an optional add-on that people can choose to buy, not included with the headset.
I believe this would sell well even at a premium price, allowing Oculus to recoup some of the losses they're likely taking on in an attempt to subsidize the headset itself.
or just link to whatever oculus suggests for earphones, since even the tutorial video reccomends using them