I believe the best way to do audio is to start with PROFESSIONAL speakers, not consumer types.  They must absolutely  meet ALL these criteria:
1) High in efficiency / sensitivity, 100 dB rated is the minimum.
2) It must have a large surface area for the drivers. ( This means a minimum of a single 15 inch woofer. )
3) It must be a two-way system, and no more, nor less.
4) It must have both drivers FRONT ( not rear ) HORN loaded.
5) The woofer's cone must be visually seen, to radiate directly into one's  listening room.
6) The tweeter needs to be a very powerful compression driver, front horn loaded, to delineate dynamics ideally.
7) The amplifier needs to be brilliantly thought-out in it's topology, and absolutely outstanding in design and execution.  Very few are !!!
Anything less, and I fully believe one wastes their time - and certainly - their money !!  
Relative to this thread's topic, ( which I consider to be misguided, highly wasteful ), IMHO, there exists no such thing as a " good " high efficiency bookshelf speaker.
Why compromise ???
These are just my own personal conclusions, truthfully attempting to guide others.  YMMV, fine.   I speak-out here after a LONG time actively doing audio.
Jeff