Given elevated breathing and heartrate are heard via bone induction, I don't see any benefits of paying high dollars for workout headphones. The loudness of your body will severely reduce the potential signal to noise ratio of any headphone you wear, minimizing large differences in sound quality. Add in most cheap headphones offer DSP and EQ in-app, you can tune any headphone to give a relatively flat frequency response. While good noise-cancelling does cost more, again, it will only reduce external noise, and not the noise coming from inside your body. I personally wear in-ear buds, but if I were to use over-the-ear headphone while working out, I would definitely buy a brand/model where extra earpads can be purchased separately, so I can clean and rotate them. $100 max for workout headphones. Now for home use, I wouldn't poo poo anyone looking to spend $5k on a set of cans (As long as they aren't Apple or Monster).