2 questios: Does O/cing effect quality of writes and whe nare the Liteon based on "6"

I have the chance to get a 40125S for about $60…but I want to know if people are finding the write qaulity dimished after o/cing to 48x…I am assuming using appropriate quality media…

Does O/Cing it affect that ability in negative way with backing up copy protection

Also when are the next generation drives due out…ie 6 series chipset drives…like the 48/24/48 drive

thanks

Neal