The Benq 1640 is about extinct for my locale. 2 months ago I tried to find another 1640. Newegg.com-out of them/ Ebay-wanted over $65/tigerdirect and other places-no dice.
I ended up getting the 1650-which wasn't available in the USA then.I ordered it from canada. Very good drive, but the PIF scans aren't even a match compared to my other 1640 burner. A week later,newegg.com got in their first shipment of 1650s, UGGH!