I have never been able to accurately show someone how good the Lumagen is until last night when I was checking for overscan with a direct to TV vs Lumagen comparison when I finally found one frame that explains it all.
This is Faroudja LD-1000 plugged directly into my Vizio 4k vs going through the Lumagen. This is not a sharpness setting (both are the same on TV and Lumagen does not have any picture enhancements or sharpness turned on).
I think I have decided in my experience the video processor makes more of a difference than the player itself (on modern equipment). My X0 with Lumagen to my projector looks spectacular, the same X0 with DVDO Duo to same projector does not. If I had to choose between a basic LD player with Lumagen or the X0 with DVDO Duo I would take the basic player with the Lumagen.
http://screenshotcomparison.com/comparison/118518