Okay to frame the advice you are after please answer the following:
1. What sorts of targets do you wish to image (what fov and focal length are your considering)?
2. How capable is your mount (tracking and load carrying capabilities)?
3. What budget do you want to invest on the OTA?
4. What sort of camera (with what pixel size and Q/E do you wish to mate it with)?
That would help giving you meaningful suggestions.
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