Best drive for -R and RAM?

Not many rections in the “What writer should I buy”, so i ask here

A mate looks for a good DVD-writer. Most important is good writing-quality, especially for DVD-R and good compatibility for DVD-RAM.

These are the writers I think:

Benq DW 1670
Pioneer 111 / Asus 1608P3S
LG GSA H10N
Liteon 165H5S

What´s the best for the main points?