Peter,
I also like the fork mounts for being able to follow an object from one side of the sky to the other.
My LX200GPS did a great job of traoking. I like to show people this 8 hour animation of the asteroid Vesta. It was taken using a 4" refractor on top of the wedge mounted LX200GPS. The LX200GPS was guided by a DSI Pro and a F6.2 reducer. The images were not post aligned, registered or processed. The scope moved from the eastern sky across the meridian to the western horizon. So good tracking can be had from a fork mount.
Now one last thing. If you decide to go with a GEM, some GEM mounts will let you image past the meridian. For ones that don't programs like CCD Autopilot will handle the meridian flip for you as well as the plate solve so the scope get repointed were it is suppose to be, once on the other side. It can also automatically reacquire the guide star and continue autotracking. It does however require either MaxIm DL or CCDSoft, but it's the next best thing to being able to image past the meridian if you have a GEM that doesn't.
-------------------- -Marcus
The problem with free speech is even the stupid have a voice.
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