the 2 set ups are really designed to do 2 different type of imaging. you mentioned that you want to image DSO's the 80 ED would be great at wide field images like Nebulae but not so great at galaxy images and vice versa for the CEGM DX 1100.
have you considered a imaging newt on a eq mount? that would give you a really good compromise of fast imaging, large aperture as well as leaving you some cash to splurge on an autoguider and imager!
just a thought
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