coolman, from the site you posted, the "LITE ON LDW811S/851S 8X " and "LITE ON LDW811SBK 8X " difference is that the first the tray is beige/gray and the second is black. If the PC is black get the black. Of course, this is if you want the Lite On. I love mine and before it I used a Sony 500a. I can burn at 8x and bitsetting to DVD-ROM I can play the Memorex printable in any player I can find, even 4 year old players.
Others have problems with their drives, so whatever you buy test it before the store warranty expires so you can return it if needed.