Your location says NYC, yet you're talking about Euros?
It really depends on which writer you're talking about and which DVD-ROM. Some writers are not such good readers, and likewise, some -ROMs are not such good readers either.
The BenQ 1640 or LiteOn SOHW-1673S (or 1693S and other drives based on the 73S/93S) are probably the best writers to consider for reading. In the DVD-ROM category, the AOpen 1648/AAP or the LiteOn SOHD-16P9S (and drives that are based on the 16P9S, which include the Sony DDU1615, NEC DV-5800D, and Teac DV-516
) can come very close to the quality of the top DVD-writers (and can surpass the reading quality of average DVD-writers). Personally, I'd get a BenQ 1640 because it can probably surpass your Plextor in DVD-write quality. If going for a DVD-ROM, some users claim that the LiteOn 16P9S is almost as good (close, but not quite) as the BenQ 1640. I own neither drive, so I'm just going by what the general consensus on the forum seems to be at the moment.