While I have never used the sport optics. I use the cameras and lenses. One problem that I know of with the cameras is that we have one place in the US to send them to for repair. So you might research where you would need to send it to for repair if needed. Overall they are a great brand and put out quality camera gear. I imagine that the sport optics are quality as well.
I am asking in some of the Pentax groups if anyone has any input on them cause Ive always been curious as well. But even my cheapest Pentax camera lens is a performer, Hope to have some input for you shortly.
I have one straight bodyED65 left on closeout for $414.00
Pentax take 1.25" astronomy style eyepieces so you can buy some nice aftermarkets for a good price. A good couple for the pentax is the Baader EP.