After trying out a few brands and speeds of DVD ROMS, I'd have to say that the OLDER ones [around 6x or slower] have the greatest benefits as least in my limited experience.
- the DVD light doesn't blink as much.
- the DVD's do not eject out feeling like they've been in an oven as they are in a LiteON LTD 163D or Pioneer 116. [both 16x drives].
- they tend to be super quiet.
There might be some drawbacks. The older drives might not be able to properly read dual layered DVD's so they :
- may stop playback [Gladiator]
- revert to the end of the movie [Aliens]
- skip a whole lot of scenes [I can't remember if it was Platoon or Apocalypse Now].
- might take some time to recognize a DVD [Aliens]
An updated firmware can help that, or as I did, I put the DVD ROM on Primary Master [harddrives on controller card].
The mixed bag were a LG 32/10/40/16 and LG 48/24/48/16 combo drives. While they were super quiet, they had that real annoying blinking light and the DVD's came out super hot.
Here's a list of what I've tried all on the same system and the DVD speeds to the best of my knowledge:
Toshiba SD-M1202 [my fav 4.8x]
LiteON LTD 163D [16x]
Pioneer 116 [16x]
Samsung SDR-430 [4.8x]
LG GCC 4880 [16x]
LG GCC 4320 [16x]
Sony DDU220E [6x]
Just my 2 cents.