John doesnt add the SDI board, I had to do the work myself.
I feed the SDI digital video feed to a faroudja scaler and then into a sony g70 projector.
I previously used a panasonic rp82 via SDI which is ranked the number 1 player on secrets test.
www.pmsvideo.com sell the sdi boards ($100ish) and the player reviews are by Stacey Spears on Secrets home theater and hifi site. Ill post the link later on for you.
Using SDI levels the playing field between dvd players regardless of cost.