Hi Barry,
We all love to dream of a RCOS on a paramount...
...but most of us can`t afford suce a wonderful piece of gear and only dream about it.!!!
To be realistic I would go with a equatorial mount like the Losmandy g-11 with gemini if you can afford that...or maybe a nice Tak mount would be nice...even if this leaves you short on $$$ to buy a OTA to mount on it. You will never be happy with any images if you skimp on not getting a solid and accurate mount...I am very happy with my gm-8 I just wish I had a higher payload limit!!!
As for the OTA, there are a few I would go for...C9.25 seems popular and I have seen many top pics with these..mainly using a a focal reducer...
A nice APO like one of Willam optics larger models like the Z-110mm or larger..lots pf great Apos out there but will cost you...$$$$..
I would go for a nice 10" newt myself something about f/4-f/5 with a ED80 or similar as a guidescope/widefield imager. With a good coma corrector offcause..
Anyways thats my humble opinion and there are so many ways to go for astrophotography setups.....
Hope that gives you some ideas...
Cheers