The RASA 8 is attractive. The Sharpstar 150mm f/2.8 is another interesting option, especially as there is no limit on the size of the camera body and it can cover full frame chips:
https://www.teleskop-express.de/shop...rbon-Tube.html
Astrobin pics:
https://www.astrobin.com/gear/84822/...rpstar-150f28/
It also is much lighter in weight than the RASA.