Well, I purchased the Lite-On (despite what the poster above me said) and it seems to be working just fine for me (I’ve been imaging stuff I burnt onto RITEKG05 and reburning onto Verbatim MCC 004).
Why did I choose the Lite-On, and not the others? Firstly, from a review I had seen on NewEgg, the LG does not like legacy --> SATA adapters for some reason. I have to use one of those since the 2 SATA power connectors native to my PSU are poorly places. Secondly, the Pioneer seems to have quality issues. There have been reports of it loosing the ability to read CDs after a certain time. Finally, with the Samsung, I just had difficulty finding it.
Furthermore, regarding the Lite-On, I can burn a full disc of data (4.38GiB) at 12x in a little over 7 minutes. Is that slow (someone mentioned something about long lead-in times).