Mark, I'm on the verge of dipping my toes into some imaging, and I'm a bit frightened by a lot of the responses and advice given on this thread!
My learning curve is going to be very steep and the age of my brain is not optimal.
I have a Meade LX200 8" ACF and a Skywatcher ED80 Pro, and I have spent a lot of time pondering which scope to use for imaging.
Then I got a tip to visit the Bintel website and use their Astronomy Setup Calculator to help me compare scopes and cameras.
I think the tip came from a Dylan O'Donnell video on Youtube, he created the Bintel tools.
The attached screen grabs show the different results, on a view of the Pleiades, using the ASI 294MC camera on both of my scopes.
My LX200 would only capture a small centre portion of the Pleiades.
My ED80 will capture the whole group, decision made!
Hope this helps with your research.
Chris