The best media I still can get atm (but dunno for how long, MBI is everywhere in Germany)
My older burners (PX-755, GSA-H22L), SH-224DB and some laptop-drives don´t like it that much, but my newer writers can be do nice results with RITEKF1 and RITEK F16
The PI is not the lowest, but actual Liteon-drives show higher PI than older drives.
My overall results and also the results from Nixa_mk, Geteda etc. looks good, better than with most newer MCC-media I had.
CMC vary a lot, only my last bought Philips-branded AM3 were real good.
MBI is the worst media atm I have (except my very exotic 4x-media)
AML 003 can also be good in some writers, but also harder to get. UME02 vary a lot, very good to mediocre results.
The Optodisc-made -R 16x from Piodata were also good, but also to get hard