My Superdrive, the Pioneer 112D, won't burn at 16x with the media I am using. I have Sony DVD-R (minus r) 4.7gb discs. The packaging says they will do 16x, but so far, I have not been able to burn a disc at higher than 8x. I have tried using my Raptor drive and a Striped Raid0 drive as my source disc, doesn't seem to matter. Just won't burn at 16X, neither a movie or just data. Apart from going to Target and getting 10 different brands and types of disc, are there any Mac Pro users with the Pioneer 112D that can recommend a DVD that has burned at 16X reliably? My DVD recording needs are mainly for: watching movies in home DVD players, and burning data. I have never re-written in my life, so I don't need a RW. Is a plus+R disc more reliable for this? Thanks!