I have a Panasonic DP UP820. One step down from the 900, it's half the price and the differences are mostly in the case, not the performance. Very satisfied - 4K discs lload quickly and have no playback issues I can tell on my 110" screen.
What is the Bu-ray plauyer that you are using?
Anything suggestions about blu-ray players, I found some blu-ray players in this article, are you using one of them?
Or directly share yours with me