I dabbled for way too long when deciding with a proper headset with an included microphone to use in both audio monitoring for corporate filmmaking in the field. While the headphones are very expensive, I feel that it's money well spent. The audio feels very neutral, and does not blow your mind away – but that's what I want when monitoring sound.
When monitoring in the field, I plug the headphones into a Canon C200 with the microphone, so my speech, comments and interview questions are recorded to the second track. I've found that the noice cancelling feature with phantom power through the microphone input's XLR has come extremely useful to be more certain what I'm hearing.
I'm very pleased with the ergonomics, and especially the possibility to swivel the right-side headphone away from the ear.
For my computer monitoring I push the sound through Focusrite 2i2 3rd gen, but unfortunately the dynamic microphone's input was very quiet. With combination of HMDC 27 and 2i2's low input, this was an issue; however, I purchased DM1 Dynamite to boost the levels, and it did the trick.
If you don't need noice-cancelling and want a stronger microphone input and don't work in a noisy environment, HME 27 could be a better choice. Nonetheless, I'm very pleased with the HMDC 27.