Only reason for using closed design headphone is noisy environment.
Open design is lot better starting point for accurate sound.
There just aren't much of open design headsets at any price point, because while worser starting point for sound quality, closed designs allows easy to achieve way above neutral bass.
Which is good for selling complete trash.
QPAD used to have open design QH-85, but I think production was ended about two ago and there are now very little of those in sale.
https://www.vortez.net/articles_pages/qpad_qh_85_review,6.html
Besides that it's down to adding separate mic to open headphone.
And open headphones of audio makers are clearly above that price level.
So after that Philips it's really down to Superlux models, many of which can be gotten for very good price.
Though many of them wouldn't be that easy for DIY mic modding.
Except for Beyerdynamic's design imitating HD-330, which I bought just as experiment.
For its price it certainly has good sound, falling only step behind its imitation goal Beyerdynamic DT990. (good balance between details and bass for general gaming)
Coiled cable just is very good and ear pads could be bigger.
That could be modded quite easily, if you can find this kind separate 3,5mm plug mic:
https://imgur.com/gallery/bKU4H
