Yes, the Plextor UltraPlex 40TSi is still the best CD-ROM regarding DAE accuracy and speed. However, most people don't own UltraSCSI cards anymore, and even fewer people want to pay $100 for a CD-ROM. The Asus 52X is under $20 and is faster than the 40TSi regarding data reading, is just as accurate as the 40TSi regarding DAE (and is almost as fast too). The Asus is also quieter when reading and extracting than the Plextor. Don't get me wrong, I still love my Plextor 40TSi, but the Asus 52X can do 99% of what the Plextor can do for 1/5th the cost (and that's not factoring in the SCSI adaptor) and is quieter too. The only reason I still have my Plextor is its refusal to die after over 5 years of loyal service; perhaps this is where my $100 went. However, if my Plextor died tomorrow I'd mourn for a couple seconds, toss it in the trash, sell the SCSI card on eBay and buy another Asus 52X. The Plextor was the best, but now the Asus 52X has assumed the throne.
Drives I Own:
Asus S520/A, Plextor UltraPlex 40TSi, Lite-on XJ-HD166S, Pioneer DVD-106S, Toshiba SD-M1712, Plextor PX-R820Ti, Plextor PX-W1210TS, Plextor Premium, Samsung SM-352B, Teac CD-W540E, Yamaha CRW-F1, Plextor PX-708A, Sony DRU-510A