I get the best results with TYG01 AT 4x, then TYG02 at 8X, then TDK TT02, YUDENT02, and old style Ritek R03, all at 8X. I also get superb results with Ritek +RW RICOHJPNW11. The least desirable is Verbatim MCC 003 and finally Verbatim 02RG20. I don't use any Ritek anymore because of quality control; the same for Prodisc. Firmware is L&D's 1.UF.
Burnmaster from Allmediaoutlet.com is genuine TY and a very good price.