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I find the 12" Meade LX200 ACF plus guide scope to be almost under-mounted on a CGE, at least if I have a dew shield on and the wind is blowing, so I wouldn't want to think about a similar configuration on an EQ6 Pro for anything other than planetary. Any future long exposure astrophotography work with an 11" SCT is going to be a bear to learn at that focal length.
The SCT will get you more light and resolution, while the refractor will give you better contrast, less dew hassles, easier setup, less load on your mount, and an overall easier time when learning imaging.
If I only wanted one scope and wanted to do planetary imaging and deep sky visual work, the SCT would be the choice for me. If I wanted one scope and wanted to do wide field long exposure and visual, I'd pick the refractor. Long exposure deep sky imaging though will require more than either one scope will give you. Because of the focal lengths and exposure times involved, either arrangement would need guiding and possibly adaptive optics to consistently perform well at anything over 30-60 second exposures. That was the highest that I was ever able to image at on an LX200 10" without guiding.
Regards,
Eric
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