like it or not, certain loudspeakers are better than others with certain genres.Well I wouldn't like it if it were true. It would mean I need over 100 speakers to play one music collection :) But it is true that some speakers are just plain better, full stop. I'm running a set of Classic Audio Loudspeakers which are 16 ohms, go to 20Hz and are 98 dB 1 watt/1 meter. The first breakup is at 35Khz, so they are fast, smooth, detailed and image great. Massive Attack, Global Communication, Fields of Nephilim, King Crimson, The Academy of St. Martin in the Fields and the Tallis Scholars all sound great on them.
Some are just plain better full stop.
A great speaker plays anything.