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Gunther,
I dont think the EM11 with a full astrophotography rig is really a contender.
The EQ6 is a cheap copy of the EM200.
It will not perform as well as an EM200 in terms of its mechanical precision (PE, backlash etc), but it will interface with EQMOD and many people are successfully using it as entry level astrophotography mount.
So long as you get a Temma2 version of the EM200, it will talk to most (all?) of the serious packages.
The FSQ is a very rear heavy scope, when you add a heavy camera and filter wheel etc, it gets even heavier at the rearend, so you need to consider this when you set it up.
You cant just slide it forward because the camera/filterwheel runs into the mount - the OTA rings want to be higher than normal so you can clear the dovetail with the dewshield and move things as much as possible and with a heavy camera you may even need a front counterweight - (guidescope).
For an electronic focusser you have to very carefully work out your backfocus, otherwise use the existing rack and pinion and a Robofocus, for camera rotation - nothing beats the Takometer on the original CAA - you only lose a few mm of back focus with this device.
Cheers
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