HI STeve,
I'm in the early stages of building a GOTO 18in dob and here are links to some of the sites I've been looking online as a guide.
http://dbpeckham.com/Telescope/CompScope/Index.htm
http://siderealtechnology.com/
I'm using the sidereal technology system for my scope and will eventually have it linked to a Argo Navis. From a cost point of view you the 16in meade is awesome bang for buck, you just need to figure out how much the drive will cost you.
Simplest method is push the scope around using the argo, then next would be putting the scope on an eq table and then last would be to put drives in so the scope tracks and has GOTO. Good thing is you can add as you go.
If you want to do CCD imaging with a dob you are getting into a challengeing area but certainly doable. YOu will need the dob on a eq table as a minimum.
Cheers
Mike