The image has many many hours of integration combined in HaLRGB method, with a lot of sub frames that ranging from 5 to 40 minutes for each exposure.
I am a visual astronomer only. Rather than using eyepieces I use several Mallincam video cameras and a Mallincam Universe CCD camera. I generally limit my exposure times or integration times to two minutes or less. My cameras send me a series of images one after. I view them on a computer screen.
The only software processing I do is the use of Deep Sky Stacker Live to stack up to about ten images as they are sent by the camera. I watch the stacked image "Develop" as the individual images are sent from the camera. The stacking acts much like a noise filter. It just cleans up the image.
It would be interesting to me to compare one of your two minute images with a similar two minute image made with my telescope. I would like to see how much of a difference there is in the image quality between your modified telescope and my standard Meade. The camera on my Meade has a 3032 X 2016 pixel CCD at full resolution with 2x, 3x and 4x Binning.
My site is fairly dark I consider an SQM reading of 21.50 to be good, above 22.00 as being very good.
The answer to your question if it is more important the equipment or post processing, it's both! plus a very dark sky with excellent seeing.
Again I am visual only. No post processing at all. The only things that affect my images are the camera settings and some stacking to clean up camera noise. Everything is done live in the sense that I set an exposure time and get a continuous series of images. A new one after each exposure. Unless I chose to save the images the newest one replaces the one before it. I only see what the camera sees during an exposure. For me it is all about the equipment.
I looked at your site and I congratulate you for your excellent observatory equipment. However, I noticed a very important detail. In your setup lacks an essential accessory to get great results with a LX200, which in either polar or altazimuth mode. Adaptive optics! Without this important accessory is impossible to obtain remarkable results, even if you had a copy of LX200 with mirrors worked 1/20 lambda.
Adaptive optics on a Meade 10 inch or 12 inch???
I think you and I are thinking about something quite different.
My idea of Adaptive optics is a system found in the newest large observatory facilities that monitors sky conditions and adjust the optics accordingly. To the best Of my knowledge those systems are not available to the average amateur.
Please explain your idea of Adaptive optics and how it works with your Meade 12".