lots of cheap drives, pioneer 111, or one of the liteon drives.
Plextor drives are still quite dear compared to others, the new benq1670 is not that good IMO.
Dunno what the new NEC/SONY partnership drives are like as i don't have one, don't think i will bother with those though for some reason, I must be basing that on something just don't know what.
I would go with either pioneer 111(as long as your not planning to use it as an external) as a couple of chipset's i have in my usb2 external enclosures don't like my pioneer writers) Or liteon
See what the other users on here think then decide.