I don't know if this is any help but I recently bought a Lite-On 1693S. Yet when I scan my discs with Nero CD/DVD Speed it says it was recorded with Sony DW-Q28A.

Not sure what that means as this burner was boxed, not OEM.

As for media. I had a load of Datawrite Blue (Optima) 8X with RITEKG05 dye and so far they have all burned OK. They all work fine on the XBOX. I've scanned them and they are all 93%-95% quality.