1/ The media seems to be okay. Not the greatest around, but it shouldn't cause you to have a coaster.
2/ What kind of IDE drivers are you using? IDE controller drivers made by Via and nVidia have been known to cause problems with various burners. It's best to use the default Microsoft Windows drivers. Don't know if this applies to you or not.
3/ Hmm. Could you provide a KProbe2 scan? See the KP2 sticky in this forum. When scanning, please make sure that your scanning speed is set at 4x. After scanning, use the save button to save the results to a .PNG file and post them here.