In June 2011, I bought an SBIG ST8300M imager, and since then I have used it for most most of my astronomical imaging. The imager is shown here attached to my 12-inch Meade LX200. The white guidescope on top of the telescope is an 80-mm Orion refractor, which uses an Orion StarShoot Autoguider for tracking.

The autoguider does a good job of tracking during a long series of exposures, and it is easy to use.  I simply click on any star that appears in the view on the computer screen, and the autoguider keeps that star on target.  Flexure between the main telescope and the guidescope are a potential source of concern, so I tried to mount the guidescope as rigidly as I could. With a series of relatively short exposures (each 3 minutes or less), flexure has not been a major problem.