sirfalas, NICE NICK! I'm not at all sure about the drives. If I'm not mistaken, the TDK's will be re-badges of other manufacturer's drives. WHere media is concerned, if you want really REALLY good burds on world class media, stick with Taiyo Yuden, available from www.rima.com in the United States. This, you will see, is easily the favorite among those that want the finest media. Both CD-R and DVD + or - R can be had from Taiyo Yuden.
Reguarding K-Probe, http://www.k-probe.com/ Many drives don't have the ABILITY to report the PI or PO errors, adn so this type of utility simply will not work. (I have an NEC ND-3500, GREAT drive, but it is one that is unable to do PO/PI reporting.) Lite-On, Plextor and Benq drives are all brands that also allow this type of reporting. Oh, sorry, I forgot to answer, yes, Lite-On is a brand of writer.
A lesser test, although still useful, that will work on your drives is Nero's CD/DVD speed. This will allow you to find out how well the disk is reading across it's entire contents. Not only can you measure that actualy transfer rate the CD or DVD is capable of, in the case of CD audio disks, you can actualy test it's quality adn ability to extract that data digitaly. (DAE testing. DAE means Digital Audio Extraction.)
To find out who actualy MANUFACTURED your media, use DVDIdentifier, or CDR Media Code Identifier or similar for CD's. (I think there are better ones out there for CD-R's, but I'm not sure which ones are best.)
All the afformentioned softwares can be had for free. Here are the links:
Nero CD/DVD Speed: http://www.cdspeed2000.com/
CDR Media Code Identifier : http://www.softpedia.com/progDownload/CDR-Media-Code-Identifier-Download-1161.html
Also, here's a link to www.rima.com 's list of Tayo Yuden media, bother CD-R and DVD + & - R: http://www.rima.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=R&Category_Code=TAIYO