These are the drives I have installed and they all work quite well. The Lite-On LH20A1H is the fastest, but my preferred reader is the BenQ 1655 and my favorite burner is the Samsung SH-S182D. The key is really using top quality media.
[N] MAD DOG MD-16XDVD9 2.FD (Usb)
[M] SONY DVD RW DRU-810A 2.0e (Usb)
[L] Optiarc DVD RW AD-7170A 1.02 (Scsi)
[K] SONY DVD RW DW-G120A MYR5 (Scsi)
[J] HL-DT-ST DVD-RAM GSA-H22N 1.00 (Scsi)
LITE-ON DVDRW LH-20A1H LL05 (Scsi)
[H] TSSTcorp CD/DVDW SH-S183L SB01 (Scsi)
[G] TSSTcorp CD/DVDW SH-S182D SB04 (Ide)
[F] BENQ DVD LS DW1655 BCIB (Ide)
My friends have some BenQ = Stay away from that piece of crap... is their message.
I was wondering what type of DVD Burners everyone is using and if you are satisfied with them. I myself use two Lite-On 18X LH-18A1P. Quite happy with them so far. Only had them for about a month. Gets the job done.