Do I have to buy all new CDs?

OK, I know the question is fecetious, But I ffel like my collection of over 300 CDs went down to about 10 that still seem worth listening to. I am new to the audiophile game, so I started with Martin Logan SL-3s and a Sunfire amp. I guess I just didn't believe how revealing they really would be. I should have guessed when I immediately realized the differences in recording quality on the two Clapton CDs I use to audition speakers. This thread has become a complaint. For future reference is there any way to identify high quality recordings before I buy?