I tried a DVD22, couldn't see any improvement from my old Pioneer DV444. Don't get me wrong, the picture was good but it just wasn't any better. (does this mean that the 444 was very good or the DVD22 just ok ).
The DV444's Mitsubishi MPEG decoder is the same as used in the DV747 and the video DAC was used in the DV656a and the Denon DVD 2800 for RGB, so it can't be that bad as these IC's represent most of the signal processing.
Sorry to ramble on, it just got me thinking as to why the HK PQ was not any better (for me anyway).