best monitors above 300Hz

What are the best monitors in the frequency range above 300Hz? I'm using a Tact room correction system. It includes an active crossover. The manufacturer recommends placing a pair of very fast subwoofers in the corners and crossing over to the main speakers at around 300Hz.

My ideal price-range is below $2000 new or used. So far I'm considering using VMPS 626R's and bypassing the woofer (it's crossed over to the midrange ribbon below 300Hz).