You would propably get more responses if you posted this question in the beginners equipment section I would say.
An RC8 on an EQ5 or EQ6 could be a good start for you with a OSC camera from ZWO, You will also need an autoguider and electric focuser.
http://www.andrewscom.com.au/optical-telescopes
Otherwise keep a look out for a a S/H AP set up on IIS.
The move from a dobsonian straight into doing AP through a telescope is a big move. You will need to learn how to polar align, guide, focus, take images and then process your images.
Perhaps start off with an 8" on an EQ mount like the RC8 and do some picky back stuff first.
Good luck.
John K.