Just got the Pioneer 109 the other day & im really happy with it.
I have found the Ritek Extreme G05 DVD-R to be pretty good, but variable results, no bad ones but not what you would call mind blowing.
I got a pack of "DataWrite 8x DVD-R" the other day, they are white on the top with a CMCMAG AE1 dye, ive never been too fond of that dye before, but I gave them a try in my new pioneer & WOW BRILLIANT!!! I will be buying these in future, take a look at my scans.
All in all I would say the Pioneer is the best drive I have tried so far, if only it had the ability to change write strategies & a region code resetter, like the LiteOn has, this stupid counting down & then locking after the fifth region change is dumb.
Overall though, great drive.
The only thing thats weird looking at the graphs is that spike 3/4 along the graph near the end, see it? its on every scan... any ideas what that is all about?