I use a Radiance XS for the HT and a DVDO Edge for the second system. I make sure the sources are set to source direct or as close to that as possible and they feed the VP's. I then use the VP's to tweak the output to the display. If I did not have the VP's, I would still set the source components to direct and use the display to tweak the image. The best test disk you can get is AVS, and it's free. I have not been very impressed with any of the "new" HD test disk for sale.