Hey blind1 welcome and don't worry about it
I wanted to tell you that I just saw tests of the two in a german site, and the 16x is better overall than the 12x. I don't know if you use CloneCD cause if you do it's important to know that the 16x can read RAW and subchannel data (which is needed for copying protected discs) and the 12x can't do it.
Anyone interested in reading the test THIS is a link to Google translation of it.
It's a relatively new drive so maybe you will be able to get it soon.