I need new CD-R media and I'm shopping to see what would be the best. Obviously Vertabim and Fuji are better than others but how will I be able to see a difference? Does it justify the heftier pricetag (twice as expensive as Princos)? Thanks for your help. For your information, I use CD-R mostly for data but I also use them occasionaly to backup my audio CDs in case they get scratched or stolen.