A note of caution on verbatim, not all of them are ritek dye based. I have had good batches and useless batches (in respect to ps2 usage). Ensure what u are getting b4 u hand cash over.
I personally use Traxdata (Branded Ritek) and use Stomp RecordNowDX4.6 and have 100% sucess rate with dvd backups. Burn speed doesn't seem to worry the ps2 either. I burn all back-ups at 4X and get no problems.
Regards