For planetary imaging, you
need the larger aperture, there is no substitute. Better than the C8 is the C9.25", it's on a different level (it's what I use) and well worth the extra cost.
I image the planets and some galaxies, and have assembled the Planetary FAQ on Cloudy Nights which you can see here (the images at the top are from my C9.25").
https://www.cloudynights.com/topic/8...-january-2025/
I've only just started with galaxy imaging, but you can see some of my better images here using my C9.25" and a Meade f/6.3 reducer. I'm in the suburbs of Melbourne, in Bortle 6 skies..
https://www.cloudynights.com/topic/9...3-27-may-2024/
https://www.cloudynights.com/topic/9...04-6-jun-2024/
https://www.cloudynights.com/topic/9...997-march-2024
https://www.cloudynights.com/topic/9...a-august-2024/