Small numbers of errors in CDSpeed depends on more than just the dvd drive. You need good media that matches up well to the firmware of that particular drive as well. What drive are you using for your scans? That can certainly influence your results as well.
My suggestion for a SATA interface drive would be the Optiarc 7240s. I'm a bit out of date regarding the IDE interface drives, so I will leave that for someone else to advise you.
I've had good luck with Verbatim 16x, Taiyo Yuden 8x +R and Verbatim +R double layer dvds in my Optiarc, but I expect good results when using high quality disks.