To list a few bookshelf speakers with 6.5 inch bass drivers under 1400$:
Elac DBR62:
This is a review and detailed measurements of the Elac Debut Reference DBR-62 bookshelf speaker. It was kindly purchased new and drop shipped to me for testing. The DBR-62 costs US $600 a pair from multiple sources/dealers. The DBR-62 comes in black and walnut finish or the distressed Oak and...
www.audiosciencereview.com
Focal Aria 906:
This is a review and detailed measurements of the Focal Aria 906 Bookshelf/stand-mount speaker. It was kindly purchased by a member and drop shipped to me. I think it costs US $2000 for a pair but I see it on Amazon including Prime shipping for half that at US $999. Better yet, they have a...
www.audiosciencereview.com
Kef Concerto Q Meta:
KEF Concerto Q META
www.erinsaudiocorner.com
Revel M16:
This is a review and detailed measurements of the Revel M16 stand-mount/bookshelf speaker. I purchased this through my company and it arrived a few days ago. Can't tell you my cost :), but retail price is US $900 (sold $450 each). As you can expect, when you pay more, you do get more as far...
www.audiosciencereview.com
With a slight stretch in budget to 1550$/1700$ the Ascend Acoustics Sierra series 6.5 Inch bookshelves would be well regarded options:
World-Renowned Performance And Exceptional Accuracy Our Sierra line of speakers represent the highest performance we offer, featuring low-resonance layered bamboo cabinets and best-in-class custom made drivers. These speakers best represent our commitment to our own standards. This will be...
ascendacoustics.com
Or the Revel M106:
This is a review and detailed measurements of the Revel M106 bookshelf speaker. It was kindly purchased and drop shipped to me. It is not a new sample but came to me with full packaging and protective wrapper. The M106 costs US $1,000 each or $2,000 for a pair. It is only sold through dealer...
www.audiosciencereview.com
A bigger bookshelf format would allow for the well regarded Wharfedale Lintons:
https://www.erinsaudiocorner.com/loudspeakers/wharfedale_linton_85/
Every listed speaker would likely outperform the B&Ws by this messageboards standards regardless of price.
Video tutorial on understanding loudspeaker measurements: