Axioms are not nearly so forgiving as some other speakers (ones with bloated bass, absent midrange, rolled off highs) so some cds I just don't listen to anymore. Page/Plant "Unledded" (No Quarter?) sounds simply awful. Black Sabbath not so great. But Robin Trower, Joe Satriani and Jeff Beck sound tremendous. Jazz, classical, blues, reggae, and just about everything else sound much better on my Axioms than my previous speakers (oh, Alannis Morrisette sounds like do-do as well).
If you listen exclusively to rock/pop M3s, M50s, or speakers from another company might be the way to go.