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Hi David, not to many responses yet but here is my 2 cents worth.
To step up from a 10"eade the choises are relatively slim. Most commercially made or at least mass produced scopes in this size have their own inherrant problems which will take some work to get up to the standard you are after.
The biggest problems you seem to face are:
The weight of the outfit and the carrying capacity of your G11. Anything bigger than a 10" will most likely be to heavy for the G11.
Image circle of mass produces scopes.
Most only come with a 2" opening which is a bit small for the ST11000, particularly if you need to use a flattener or reducer.
I think your options are limitted to the standard scopes in the 10" range such as the 10" GSO RC, Deep sky instruments 10" RC (Probably your best option.) or a Meade 10" ACF.
Out of this range the DSI Rc is probably the one which is designed with a corrector which will handle the 11000 camera. Even this will be touch and go on weight and will cost significantly more than the other two. This said it should work out of the box without requiring a new focuser which both other scopes will require before they can bbe used.
Good luck.
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