Ack, I just ordered another batch of Riteks from shop4tech and they sent me the LEDA brand (Princos if you examine the disc using ADVDInfo).
Anyway, I called to complain and they asked "Won't these work for you?" and I said, "I don't know". So they told me to try 5 of them and if they don't work, they will exchange them.... if they do work, they will refund the difference.
Well... I burned GTA:VC on the Princo and played for over an hour with no problems on the PS2.
Burnt Burnout and Splinter Cell on a Princo and played fine on my XBOX
Also burnt some video on the Princos and they worked great in my Pioneer F-727 DVD Changer.
Looks like I will be keeping the Princos and save the 10 bucks on 50. $39 bucks shipped for them.