Side Speakers with Limitations

I have a home surround/theater system.  My front left and right speakers are JBL 4367s.  I temporarily am using some very old B&W DM17 limited speakers for the side speakers as these meshed better with the JBLs then my KEF Reference 1s which do much better fronting my stereo system.   My room is approximately 13' x 13'.  The side speakers are each about 6 1/2 feet from the listening area.  It is my understanding that my B&Ws were meant to be a small monitor in tight locations (near field) which is why they likely work better than the KEF.  I would like to upgrade the B&Ws to 805d3, but my wife does not like the look of the tweeter on the top.  She says it looks like something that would be used in another way, other than musical pleasure.  Anyway, I am looking for suggestions for another side speaker.  Here are the requirements: (1) the sound quality and imaging must work well in tight room constraints; (2) it must mesh well with the JBLs in front and likely JBL SCL-3s (ceiling speakers) in the rear; and (3) one of the speakers is likely to go into a built in bookshelf so it must function well being close to a wall in a bookshelf.  Some possible speakers that I thought might work include Raidho XT-1; Harbeth P3ESR; and ProAc Tablette 10 Signature.  Any suggestions and reasons for the suggestions would be very helpful especially if you have actually heard and lived with the suggested speakers.