In a smaller, desktop, less expensive 2-way vain, with F3 between 42 and 56 Hz and prices from $400 - $2,100 I'd look at:
Adam A7X, Dynaudio Excite 14A, Focal CMS 40, Genelec M040, Gibson Les Paul 4 Reference, Neuman KH120, and PSI 14M in conventional layout.
For coaxial designs, I'd consider Audio Pro Solutions, Equator D5, and PreSonus Scepter S6.
Note that most of these are primarily designed for studio use and as such are voiced for near-field use to produce a highly accurate, analytical, and dry sound to reveal all the warts, not to entertain audiophile quirks. Can you handle the truth?