I have burned about 70 Memorex DVD-R 4X and have copied via DVD shrink and copied via nero. I have viewed these DVD's at least once, 98% played ok, a few played but kind of froze in the middle of the movie. This is with me burning at 1x to guarantee best trasnfer. Now, even some DVD's that I have played before, won't play in either two of the DVD players I have. It almost sounds like they are expiring. Is this the memorex DVD's? I am pissed. I am looking at the Ritek, but I see the regular Ritek G04 silver shiny top and the Ridata G04 with matte top. Are there any difference? All inputs appreciated.