Nero is not the best Audio CD burner.
Try Burrrn (www.burrrn.net). It's free & simple to use, does a fine job.
Also burn at 16 or 24x, although my LG4163B does a fine job with TY CD-R at any speed.
Other media to try is Verbatim, either Pastels (again a TY dye) or Super AZO.