If you want good CD burning, don't go with the Liteon. They really mucked up the CD-R burning in their latest burners.
For the NEC, you may need to reduce burning speed for stable burns on "not great" media. (since it uses the same chipset as the Pioneer 108, and some disks give me problems at 32speed, there is a chance you will see it too)
I have had no problems so far with the CD burning of my Benq 1620.