If you were to try to get better results, your best bet would be to slow the burn down, as Roadhog said above. So I would just try a lower speed [12x is usually a good place].
You may also try tweaking the SmartBurn settings. However, note that some of the SmartBurn features–specifically, HyperTuning and Online Hyper Tuning–may not work with the Taiyo Yuden discs. [LiteOn has opted to disable HT/OHT when writing certain Taiyo Yuden media at certain speeds, but I cannot say for sure this will occur.]
Also, with good media, turning these options on gives worse results than it does better. But you can try and see. [Note: to check to see if HT/OHT are working, write a disc–don’t simulate–in CD-DVD Speed. There should be dips in the write graph where the drive pauses to recalibrate. If not, then HT/OHT isn’t taking place.]
I suggest browsing the LiteOn forum to see what others are getting, quality-wise. http://club.cdfreaks.com/f44/