Your criteria is pretty exacting for a $500-$700 pair of speakers, but the speakers that come closest in my experience are either of the stand-mounted speakers from the GoldenEar Aon series, either the Aon 2 or Aon 3.
Features include:
Here's a Stereophile review of the Aon 2.
Features include:
- Bass extension to 38 or 42 Hz, depending on model. Each speaker has a pair of passive radiators, which extend the bass and raise the output. When I was listening to a demo at a "Music Matters" event, people were looking for or asking where the subwoofer was. There was none. That's how linear the bass extension is.
- Sensitivity of 88 or 90 dB with 1 watt input
- Best of all, these have a sensitive, organic, articulate treble without a trace of harshness. They use a Heil-type folded ribbon tweeter, which has a much larger radiating surface than a typical dome, and is not subject to harsh-sounding overshoot, "oil-canning", or metallic-sounding resonances of metal dome tweeters. These are some of the most natural-sounding tweeters I've heard. And they do cymbals just fine.
Here's a Stereophile review of the Aon 2.