I voted for the LiteOn 165P6S. I now own one and it's the DVD-burner I've ever had.
OK, that's not hard- my previous drive was a SOHW-1213S@1653S, which was not the world's best burner (OK @8x).
But what I really like about this drive is the added value as a technical toy. Some of the LiteOn developers (Karr, Wind and now "Tom") are putting out test firmware and tools with new capabilities for the 5S and 6S drives: Hypertuning and overspeeding capabilities, an experimental "Online Hyper Tuning" similar to BenQ's WOPC. The test firmwares also support 16x reading for all DVD+-R, not just those with a 16x burning strategy like the official firmware to date.
And the icing on the cake is a new toy: DVD Scan Beta .01 that does jitter, FE/TE and beta scans for the 5S and 6s drives with the test firmware. It's definitely a beta- the user interface is full of warts and you have to disable all other optical drives in the device manager to get it to work, but it's available and there are lots
of things to try.
What more do you want from a drive? Just about every burner now does well @8x these days (and that's really fast enough) so we look at other distinguisching features. 18x ? Fuddle Duddle. Lots of tweaks and tests is where the fun is!
See this thread at CDFreaks
about DVD-Scan. The official download link doesn't seem to work: try the one in this post.
Attached is my first jitter scan (an ancient test disc from my first burner).