You want a Writer, not a ROM (read only) DVD drive.
.. My preference is LG, pioneer, and samsung, Do not recommend Lite-on
.. Lightscribe is a plus, only if you want to label your disk that you write to.
Blu-ray - Only if you want to watch Blu-ray on your computer, or want the increased write capacity. More expensive and Two Flavors.
.. Blu-ray Rom/DVD-RW. Will play blue-ray (Can not write to Blu-ray) and will read/write to DVDs and CDs
.. Blu-ray RE/DVD-RW - read/write Blue-ray disk, DVD disk and CDs