This image is really is very nice Rex, Brilliant job.
If I was to suggest something, you could (if you wish) remove the orange-ish look to the nebula by adding some magenta (or by dropping the green level) to give it that rich red CCD look, and maybe a little touch of star reduction to bring out the nebula details?
Attached image to show what I mean, hope you don't mind.
Cheers
Jo