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hi agivney,
welcome, and am loving your enthusiasm!
interesting idea going with the 1100 HD -i'd probably advise against it, while it does seem flexible; when at f10 it may take some taming to guide at such a long focal length, and on the flipside imaging at f2 will be challenging also as you will quite easily go out of focus due to the sensitive nature of f2.
these aren't surmountable issues, however you should be aware that it is frustrating enough learning astrophotography with a forgiving system. so depending on your personality it could turn you off astrophotography for good - and we don't want that...
as pete mentioned, go with the best mount you can afford. i'm not familiar with CGEM and don't know if it is appropriate for (deep space) astrophotography with an 11" SCT+cameras it would however likely be fine for visual and planetary with that weight though.
other things to consider - as pete said, a high quality focuser such as a moonlite or feathertouch and possibly an off axis guider with quality guide camera (eg lodestar or QHY5 II).
a good way to know what type of system to get is to work backwards from photos. see ones you like and take note of the system used to acquire the image. there is no perfect scope that does everything, I like largish newts as i consider them the closest thing to an all-rounder (and cheap). But saying that I foresee a nice widefield refractor AND a large Ritchey Chretien for long focal lenght work in my not too distant future.
best of luck.
Rusty
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