I decided to install the GMK Carbon keycaps on my QFR board (the one I repainted a few months back).
For some reason the mods or dark colored caps show up as black in the photos but believe me they are really dark grey with orange legends. And I think orange, grey, blue go together.
The caps did considerably lessen the noise for my MX Blacks (well they were not really noisy to begin with) but because this are thick ABS the sound level actually went down compared to ABS keycaps. I posted a video (check my previous post) on how this board sounds like with OEM QFS ABS keycaps.
All in all I am happy with the puchase