I have the PSA Stellar GCD and am very impressed with it. In fact, so much so, that shortly after it's break-in period (of about 40-50hrs) I bought a second one. The preamp section is also very, very good. As is the remote. And in my listening room the home theater by-pass function sealed the deal. The headphone section is raved by others however I prefer my Audeze Deckard (approx $600 years ago) (If that section requires it's own break-in period then I haven't given it a fair shake). All-in-all though the CGD is an excellent value IMO.
I also use an Oppo BDP-105D and there is no comparison between it's DAC section and the GCD. The Oppo's were touted as having good dacs back in their day, for a CD player anyway.
BTW, I also have an older Schitt Bi-Frost Multibit DAC. A nice piece for the $$ though the GCD is levels above as it should be. I believe you've zeroed in on two companies with great reputations for offering products that swing way above their price points.