I have a week old 1650. Qsuite tells me that my mcc 004 cannot be burned faster than 12x. Maybe true as I did a 16x burn, (you can find my post earlier), and the last 6% of the disc is terrible. I burned these same discs @ 16x on my liteon 165p and my nec @ 8x (2500a) and they were fine. I did do a 12x burn on my 1650 and that was OK.
I don't know how to tell what serial number, etc.. the Verbatims are. I bought mine at BB and they say MIT. There is nothing stamped on the discs. How can I find out if these are ProDisc, CMC, etc.. I also have the issue of it starting and stopping constantly when it reads discs in nero. It's done a wonderful job on CMC 48x cdr's. I'm going to try and stick with it through a f/w upgrade or two. Try a 12x burn and see what happens. I don't know much about qsuite and how it trains itself etc., and whether that would have any impact on things.