Of the three iterations, I'm liking the second one more than the others.
The second one is less "blocky". Stars are more pinpoint and more of them. The nebulosity is more extensive, with a greater range of tones and dynamic range. The details that can be seen are also far more extensive and easier to see. This includes the subtle nebulosity that resides between the main "petels" of the nebula complex - it is mottled, subtle and with its own structures. The third pic in particular removes so much of the subtle complex structures. It has the least amount of visual vitality.
Bring up all three pics side-by-side and toggle between them so compare their differences.
As far as colours go, this is a very personal/subjective aspect. My own colour perception is different from yours, and my monitor is different again, so I won't comment on the colours. What is "correct" is really invalid. It is all about the visual appeal.
Alex.
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