A good M20 Marcus (I love your colors), though I feel there is more detail to be had in the highlights - your data certainly seems fantastic and way deeper than your typical M20.
For reference have a look at
this image by Jay GaBany - one of my favourite renditions of M20 to date. Your 8-bit JPEG source yields the attached without much effort for comparison (removed by request). That said, I know we have polar-opposite tastes when it comes to bringing out detail.
Regardless, well done.