I'm using DV3050 from blankdiscshop.co.uk - they're MCC01RG20 4x DVD-R inkjet printable blanks in jewel cases that indeed write at 8x in an NEC ND-2500A (in my case, using the earlier revision of the 1.06 firmware). There is a little "Verbatim DVD-R 4x" logo in the hub area.
I haven't a Lite-On writer to check the quality of the written discs using KProbe, but they scan with no errors using DVDINFOPro on my Lite-On LTD-163 DVD-ROM (Dell OEM version, GDHJ firmware). I've just run Nero CD-DVD Speed 2.11.4 over one of these discs that I've written 4.11GB of data to with the following result:
Note that the machine was far from idle both CPU and I/O wise during the CPU usage part of the test - amongst other things there was a backup set duplicating from my big IDE disc on a different IDE channel to the optical drives to my SCSI DDS-4 tape drive. The burst speed figure and, to an extent, the CPU usage figures usually turn out to be garbage on my dual processor Xeon machine.
Order in units of 10 and you get the outer cardboard boxes as well. In my case, the outer cardboard box is marked "Made in India" - so I suspect the discs are actually made by Moser Baer using a Mitsubishi ADIP and probably Mitsubishi dye.