Isn't it a stunning region. It has to be my most favourite part of the sky. You've done really well to capture the red nebulosity and the subtle shades of yellow in the clouds next to Antares.
My only criticism would be M4. If you do a repro, you will have to take care not to burn it out. Select him, invert and feather by a few pixels. Then work on stretching the rest of the image.