I've done a lot of backups with DVD/RB and CCE using 2 pass! Qprec = 16 and Bias = 25! Quality is great. On my TV the image is clear and sharp I read somewhere that 2 pass is enough if a bitrate is not to low! then I read somewhre else that at least 6 pass are necesary for good quality, some even doing 9 pass????? So in future, how many passes should I do???
Which CCE do you have? Basic will only do 2 passes. After 2 passes it's all personal taste. I've also read 4,6,9 passes but I don't think there is a real answer.
I've read that the difference between 2 passes and 6 passes is very minimal, and that it's not even worth it.