Well, IMHO, you need a 'musical' midrange in any system just to get your interest. Beyond that equal demands on other frequency ranges might well depend on the type of music you enjoy most. If you like voices dir-range is everything. Those little LS3/5A are (potentially) a musical wonder. If you listen to flutes and recorders you must also have great, natural, upper-midrange and highs. If you like solo piano music from a Bosendorfer Imperial Grand you want great, natural, bass as well as mids and highs. Unfortunately most audio equipment is designed and built to satisfy the needs of audiophiles who are more driven by the abilities of a system to produce a sense of infinite resolution/detail/stereo imaging and impact, all of which have little to do with live music in a natural acoustic.
Personally I'm a piano guy - I want a system that replicates the sound and power of that Bosendorfer as I would hear it in concert. I'll never get it 'cause it can't be made yet, but the closer I can make it sound like one, the more likely I'm to buy the product. Great musical mid-range without equally good bass is for me like having a good looking woman with no bottem end! :-)
Personally I'm a piano guy - I want a system that replicates the sound and power of that Bosendorfer as I would hear it in concert. I'll never get it 'cause it can't be made yet, but the closer I can make it sound like one, the more likely I'm to buy the product. Great musical mid-range without equally good bass is for me like having a good looking woman with no bottem end! :-)