The most problematic part of your requirements is the intended bookshelf placement. Not many speakers are capable of working at their best against, or that near to, a wall. If you really do intend to literally bookshelf mount, then you might be happy with the Dynaudio BM5A at $999 which not only has 3 settings for LF adjust, but built in adjustable high pass filter (or not) for use with subwoofer.
http://www.sweetwater.com/store/detail/BM5A/A better sounding speaker still, but without the high pass filter and with 5 dB of adjustment for the LF to attempt to adjust for wall proximity is the Dynaudio BM6A at $1600.
http://www.sweetwater.com/store/detail/BM6A/And finally, possibly the best of the bunch except probably not quite capable of the ultimate levels of the Dynaudios would be the Tannoy Precision 6D at $1500/pr.
http://www.sweetwater.com/store/detail/P6DAMon/#anchorI have not heard this exact model but did hear the predecessor (the System 600) and it was one of the most fabulous sounds I have ever heard from a near field monitor - dead even frequency response right down to around 60 Hz - revealing mids, superb bass (though a little limited as a 6.5" driver must be). I could happily live with that sound for a long time. I would imagine this Precision 6D model could be better.
I have heard the Dynaudios, the Genelecs, the Mackies, the KRKs. I find the Dynaudios generally revealing and truthful in the mids, OK in the bass capable of near realistic dynamics - their strength and decent in the highs. Imaging is typical - only the Tannoy is distinctly superior than all the rest due, I presume, to the concentric HF driver. Note that what looks like a regular tweeter in the 6D is actually a super tweeter operating from 8 - 51 kHz. Also note that there is a digital input as well as analog with the Tannoy.
Finally, I feel the Mackies and Genelecs tend to a "hi fi" sound - that is, with a slight emphasis on the top and bottom or a slight scoop to the mids. The KRKs tend to be flatter through the mids but all three have bass of no particular merit - not informative, not quick, not flat, nothing really special - just the usual. The Tannoy System 600s, on the other hand had particularly great bass (I like good bass, and it's rare), so I wouldn't be surprised if the new Tannoy was also good in this respect.
P.S. most pro nearfield monitors have some sort of adjustment to allow for placement near a wall. The Tannoys do, as well.