I agree that media choice is crucial, but…
For DL media, the only consistently recommended media is
[B]Verbatim +R DL (MIS)[/B]
Be certain to buy made in Singapore and not made in India (MII)
btw,verbatim +R DL media is not made in Japan
The MIDs are:
MKM 001 (2.4 - 4X) be certain it says MIS on the spindle label.
MKM 003 (up to 10X) be certain it says MIS on the spindle label.
The MKM 003’s are more picky re: burner and firmware, but will yield great burns given the right choice of burners and appropriate write strategy