BETTER NOT HAVE INTEGRATED HEADPHONES! I do not want to be forced to listen to audio on trashy cheap headphones.
I'll use my own.
Ugh, seriously loosing count by the number of times I've posted this on various forums and usergroups but honestly, your complete lack of understanding, foresight and elitism is laughable.
Anyway, here I go again...
Even if your headphones at 10000x betters than anyone else could ever make, understand that by simply including (rumored to be removable) headphones you'll benefit from the developers being able to target a sound device that everyone is known to have.
Oculus have invested millions in buying software and resources from companies that specialise in 3D positional audio. These are technologies that only work with headphones so it's makes business sense to make sure everyone can experience all the effort they're putting into this tech.
Without headphones developers would have to target "movable" headphone audio and "static" speakers audio, splitting the workload and ultimately decreasing the quality of their work for everyone.
Also consider that these headphones will likely be very much a "reference" quality. Developers are able to create their games with these specific devices in mind - but if someone swaps out their headphones, fine.
Ultimately, regardless of your stance on the matter, you're going to benefit.
I very much doubt they will be cheap crappy headphones, Palmer himself is a total audiophile, everyone that has used the CB demo headset have commented about how good the sound is.
Also, this. Palmer has described their audio solution as doing "audio as well as they do video" - which, having tried many iterations of the Oculus Rift, I can say I'm looking forward to trying too.
EDIT: Oh, and don't even get me started on the wires! Adding your own headphones adds more wires that I'd happily not require in a heartbeat.