My favorite VR headphones for the Oculus Quest, Oculus Rift S, and Pimax 5K+ is the Skullcandy Crusher Wireless. Not only do they double as a great pair of bluetooth headphones, but they also work extremely well with all the VR headsets I’ve tried. I also managed to find the perfect length headphone cable that makes using them extremely easy.
Link for Crusher Wireless: https://amzn.to/2IfydrF
Link for 8 Inch Cable: https://amzn.to/2WJpZkG
Link for MMX 300: https://amzn.to/2WMpshM