From the page you linked:
hmmmmm......smells fishy. Smacks of a cheap Princo or other TDK/Lead Data knock off. If you're gonna try them, I would grab a small cake first, or maybe see if they have some sort of sample pack that would let you try few different bargain brands at once. I've had some good results with the 2X Accus on my A04 (scan with a 2X Lead Data ID, near TDK quality). I think they have a cheap 4x out now also.
NOTE: It is not recommended to use Sonix DVD-R with Sony branded burners, our tests show that Sonix DVD-Rs have compatibility issues with many Sony burners. For Sony burners, we recommend Ritek and Optodisc DVD media. Those two brands have almost no compatibility issues with Sony burners.
If it ain't broke don't try to fix it! But, hell if you can tweak that bastard just a little bit more....hehehe.