The best choice for me ist Herries 1.08 firmware (HP 1.27) or the same one from The Dangerous Brothers (it has version number 1.27). The advantage over the stock firmwares is, that you can do bitsetting, so DVD+R/RW are recognized as DVD-ROM. Even older stand-alones can play them then. Some DVD-ROMs may read them at higher speeds than not bitsetted DVD+R/RW.
I haven't experienced quality issues with these versions as I did with Herries 1.07betaX firmwares.