Well I'd take a 1620 over a 1670 any day. And my 1620 burns basically identical to my 1640 and 1655 with most media, so it's an excellent burner in its own right. I just bought mine from ZZF a couple months ago. It's not the oldest generation BTW, I think the DW400 (4x) was their first drive, followed by the 800/822/830 series (8x). I have an 822, it is a very good +R burner, solid -R burner. And it also supports high speed ripping, quality scanning with jitter measuring, etc. I basically just need the 400 and then I'd have every generation of their drives.