Just my two cents worth.
I had the privilege of having my AX-100 calibrated by alvinthx2. He generously agreed to give up one of his saturday afternoons and travel all the way from Pampanga . Previously it was calibrated by someone else using a dvd test disc. My Pioneer 969 was then used to upscale the video to 1080i and I thought at the time that the video was already great looking. But after alvinthx2 did his grayscale calibration, the difference was phenomenal (IMHO and everyone else who has had a chance to watch in my set-up). And this was using only the 480i output of my Pioneer.
He also brought his HD-DVD player and so we were able to compare what the output of my PJ would be with HD-DVD. While HD is HD, IMHO parang di na ganoon kalayo ang difference
.
Before calibrating my PJ, he even tweaked my audio system too. The equipment and software that he used were beyond my comprehension (and wallet of course).
After what he did, it was and continues to be like having a new dvd collection since all the movies look so much better. A totally new and rewarding experience.
I am really sorry alvinthx2 if you will now be deluged with similar requests