Hi Bernhard,
If you're sure you want to exclude photographic use, my answer is the Meade ACF SCT. They perform superb visually.
CS, Björn
EDIT, PS: you've posted an image of the LX200 from Meade. You may also consider the LX85 8" or the LX65 8". The optics is the same. The LX200 has a mirror lock which I guess you won't need for visual.