OK, I guess in fairness I should 'fess up: I do have an Edge HD800, but I did not want to bring that into the equation, because to me it doesn't matter: Yes, there would be practical and financial advantages to getting the Hyperstar 8 for it: Just one scope to pack, cheaper . . . . But, it would not be cheaper for me if, having laid out the cash for the Hyperstar, I just had to shell out for the RASA anyway because I was dissatisfied with the Hyperstar images. I am fortunate that I can afford to own both the HD800 and the RASA 8 if that is what it takes to get satisfying images.
So, for me the only issue is which one will produce the "tighter stars".
(Altho, now that I think of it, I have also heard the colours are better with the RASA.)