One side of this to consider is that audio is a large part of the VR experience and many on head-fi are serious (aka picky ) when it comes to their headphones.   I personally would prefer if the Oculus didn't integrate headphones into the headset. That would let me use the Oculus while...

Here is a good chunk of some of my best gear. At least audio/video wise...

This headphone amp looks very nice. I have an older 5M21 power amp for my speakers which I absolutely love so I know that Luxman makes some great quality amps.