With out any hesitation the Borresen X loudspeaker
or Perlisten R7
both are much better then anything in their price class IHave heard both at audio shoot outs at audio clubs they each do things a bit differently the Borresen uses a great ribbon for ultra speed and transparancy,
the Perlisten has a waveguide with both midrange and tweeter sharing both.
if ultimate spl levels and bass slam is your goal then the Perlisten
for huge soundstaging and ultimate resolution then the X3 , they are both big speakers around 50 inches high .8 have heard many these 2 stand out in the $10 k
price range.