Verbatim's parent company, Mitsubishi Chemical, has announced a new mastering disc called the "Green Tune" DVD-R. To maximize sound reproduction quality, these 4.7GB discs utilize a gold reflective layer and AZO dye. Here's part of their press release, translated from Japanese:

Mitsubishi chemical media corporation (head office: The tokyo Minato-ku, president: Otsuka heavily virtue), postscript type DVD for the mastering and Green Tune we sell DVD-R in the middle of October. As for Green Tune DVD-R, for the music production of the professional, it is the disk which reproduces the highest sound quality...

...As for the largest point, in the reflected membrane the high sound quality it is to adopt the pure gold reflected membrane which actualizes high endurance. The transparent impression and the depth impression of sound were actualized not only, long-term conservation (long-lived) the improvement it could point the pure gold reflected membrane. In addition, the AZO pigment where the reliability which this corporation developed is high was adopted to the record aspect. Furthermore, also the high accuracy formation technical which is applied to the next generation disk of royal purple laser correspondence has contributed to disk quality improvement largely.
Mitsubishi has not announced a price. However, AV Watch expects the discs to cost about 1,000 Yen ($8.60US). If you'd like to read more, Mitsubishi's entire press release can be found here.