Store near me that takes returns without a fight was having a sale on a retail box of a 4163B so I thought to myself, let's check it out. So I looked at it in the store, it's made in Korea Jan 2005 not China (March 2005). Great thinks I, let's try it out.
So I took it home and just tested it. It's also noisy on cd discs in the drive. Marginally quieter but still too much.
I'm now contemplating exchanging the OEM Chinese one for a NEC 3520 in exchange for $10 more, and seeing if that's better, and whatever is better, keep that.
I do notice squeezing the 5.25 bay in the appropriate places can make the noise worse. Yes, vibration and noise does bug me.. I have a fanless PSU, am going to turn my video card fanless soon, and have a 80mm cpu fan instead of a 60mm. So you can see why I wouldn't want a noisy spindle. Probably the noise is the drive going straight to 40x on the CD. Probably.