[BTS (Brent)]

Hi everyone!
After lurking around the forums here for awhile now, I've come to the point where I need to get some advice on an ideal imaging scope/setup.
I've always had a passion for astrophotography and see think I finally need to do something about it....
I have a 13yr old Celestron 8" SCT with Vixen GP mount on which I have taken same planetary and lunar shots through. Very happy! But it very rarely gets used nowadays. I'd like to keep this scope to use....
....But I now want to move onto something bigger/better(?) for DSO imaging. I've already decided (but have not yet purchased) on my camera, a Canon EOS 40D. I'll later fit this with some of Hutech's Ha/nebula filters and a shutter release (although a laptop can be used while using the LiveView mode).
What I had in mind (and I'm open to ANY input here) was to buy a Gemini GOTO fitted G11 Losmandy mount (sturdy, yet bulky), fitted with a f/4 SW-254 (Skywatcher 10" newtonian) giving only 1200mm focal length. Is this practical as my f/10 SCT has 2000mm FL?? Should I go to a larger SCT? My budget doesnt expand much past what I suggested above.
Should I go for a fork setup, can someone recommend/refute this type of scope? or would I be better to stick to a GEM? I like the Losmandy mount but for the price of this I could buy a very decent SCT (sturdy enough??)....
I know choosing a scope is a personal thing too, being many factors involved ie. size, weight, car space.... but is there anyone out there that can please point me in the right direction? In a later post, I'll ask about guiding recommendations....
Thanks and clear skies to all!