For blank media, hard to go wrong with Taiyo Yuden and Verbatim.
Also agree that you are probably trying to burn too close to the edge. As you approach the outer portion of the disc, wobble increases, speed increases, the laser has a more difficult time trying to focus, yada, yada...
This happens with all media, but much more with marginal or crappy media.
4300 MB is a nice safe size...you can push a bit more with quality media, but might not be worth it. I burn out to 4470 MB with TYs and verbs...no problems.