My results, mind you not trying many types of media:
Ritek RiData DVD+R 4x (RICOHJPN01 I think it is), excellent
Mitsubishi Chemical Company DVD+R 8x (often sold as Verbatim) MCC03, excellent plus
Taiyo Yuden DVD+R 8x (I forget the code), exceptional
I have a lot of trouble with CMC MAG F01 but CMC MAG E01 burns quite well, mind you only at 2.4x.