I always find it interesting that the digitalfaq.com is always tossed out like it's gospel. I guess testing with $20 lite-ons and lots of anecdotal evidence must be true.
I also find it interesting that Mitsubishi Chemicals' decision to have CMC manufacture the Verbatim brand along with Philips, one of the pioneers of optical media and publisher of the disc book standards, as well as HP all rely on CMC for their products. Would not the optical engineers at those companies have at least as much knowledge about true quality standards as online enthusiasts. They surely have better test equipment. But I digress.
Has anyone bothered to check his burner?
New Drive selected : 1:1:0 - LITE-ON DVDRW LDW-411S FS0F
DVD+R 4X (5400KB/sec) maximum by CLV
DVD-R 4X (5400KB/sec) maximum by CLV
try some really good media, and then decide if you need a new burner or not.
The chances that any readily available new media will work is slim to none.
To the OP, read the reviews at CDFReaks, they always test media in their burner reviews and usually CMC is included. You'll also note that many modern burners do quite well with CMC burned at max speed.