I burn my audio CDs at 8X using TY media and my Lite-On LDW-851S DVD burner, so that I have a better chance of them playing in my car CD player. I don't label them with label makers either anymore. All this is per advice in this forum.
I'm sure I could burn them at 16X without any problems, but I'll just stick with 8X for audio CDs for now. Based on this, I would have to say to not worry about burning at 8X on your NEC.
SKAARJMASTERDUO: WinXPSP3,C2D E8600,Gigabyte EP45-UD3P,4GB RAM,Nvidia GTX-280,Pioneer DVR-216D,BenQ DW1655,Asus E818A3T.
DRAGONSLAYER (bye): WinXPSP3,P4 3.2,Asus P4800-Deluxe,3GB RAM,Radeon 9800Pro 256MB,LG GH22LP20,Asus E616P3,Lite-On LTR-52327S.