For dual-layer disks I would only go for Verbatim media. Burn the 2.4x media (mediacode MKM 001) at 2.4x and 8x media (MKM 003) at 4x.
For single layer media, I'm currently using Verbatim 16x (MCC 003) and Sony 16x (Sony D21) DVD+R media. Writing to both at 8x and getting very good results with my Optiarc AD-7201S (basically the same hardware as 7200S just with additional Lightscribe support)
The only setting I would recommend is changing the booktype for DVD+R DL and DVD+R to DVD-ROM (changing DVD+R booktype is only supported on patched firmwares, for DVD+R DL it should be the default setting)