Craig> I tend to buy cheap CD-R drives and relatively
  Craig> cheap CD-R discs. Thus I don't push the
  Craig> envelope by trying to go much beyond 16x and
  Craig> do reasonably well (coaster percentages < 10%)

Any percentage >0% is unacceptable if it means that you
have to sit and listen to each copy to make sure it's
okay, and make and mail a new copy if you're making it
to give to someone else.

When I was making copies of music on my Linux machine,
I burned at 2x. It took longer, but I got 0% bad
copies.

-- 
Lynn David Newton
Phoenix, AZ