While knowing you get an exact copy is "nice"...
it REALLY important to your listening pleasure?
At what point does "precision" become "Obsessive Compulsive"?
Don't get me wrong, there was a time when I had the same worry.
And I fretted over it a bit because I didn't know why.
But after a while I only saved as wav the CD's that gave me major fits ripping.
Then I got a new optical drive and started rescanning many of my problem discs
and simply didn't have problems with >80% of them..
So on THOSE rescanned CD's I created new mp3's for playback, deleted the archived WAVS for those CD's and ceased worrying about it.
IF there's an error I can HEAR it's worth worrying about, if not... why worry?