hahaha you can do well with the 10" and 40d look at my website most of it is with a modded 40d, 10" SW dob and EQ6 with a ED80 stuck ontop. i have modded the guts out of it now to make it do what i want to do.
http://www.brendanmitchell.net/Proje...54/254side.jpg
To be honest if it was me stick with the 10" and upgrade your mount. if your doing photography the 10" is very capable as a astrophotography rig a few small modifications and it is very very capable.
Look at something like the Losmandy G11 with a ovision worm gear. that will sure up the tracking and stability so it will hold on to a little bit more wind. If it gets too windy just run with your ED80.