i agree w/ewe - a *great* system should do *everything* well. it has to for me, cuz i like small acoustical stuff, as well as loud raucous music. that said, not everyone is like me, & there *are* some speakers - martin logan cls' come to mind - that are excellent, amazing, really, w/smaller-scale music, but they yust don't have the dynamics for large-scale & electronic/rock music.
regarding speakers that sound fine for pop/rock, but not smaller-scale works, *i* haven't heard 'em, but i understand why this could be true for some - as long as speakers can go loud w/out distorting, this is fine for some rock-lovers - soundtaging cues, depth, tonal accuracy, etc, oftentimes take a backseat to the enjoyment of this music, for lotsa folks.
one person's opinion, doug