Yep. I agree.
I currently have a bit of a menagerie of scopes.
I started with a C8 and binoculars. Then bought a PST solar scope for solar viewing.
When I built my observatory I took the plunge to upgrade my mount to an EQ6 and I bought an ED80 for guiding and "short" focal length imaging. Then a C11 came up for sale at a good price so I got that to replace the C8
. And then the 16" lightbridge came up also at a good price, and I got that to use to visual stuff (and for when visitors come around
) so I can leave my obs set up for imaging.
I planned to sell my C8 and CG5 mount, but after seeing the results I'm getting from the C11 with the Staranalyser spectroscope that I have, I'm not sure its the right thing to do. I can get much better results from the C8 than the C11.
I think if you upgrade to a 10" or 12" dob, provided you can devise a way to move it and set it up easily (a trolley is good if you can) then I'd suggest you could pass your 6" on and you'd still only have one scope...
Al.