I have learned through many years any speaker that sounds good
will sound at least 10-20% better just by upgrading the wiring and rebuild the Xover with Good quality parts 90% of speakers even at 12kor more rarely put top quality capacitors,resistors inductors ,and yes you get what you pay for . Duelund cast capacitors way too expensive and too big unless you have a Big speaker or external Xoverand the $$. On average $1-2k in parts can get you a Exceptional Xover
that will transform your speakers.for the majority use Solen or lower grade Clarity or Mundorf ,not their top stuff.I have been doing this for almost 20 years even with your electronics ,it pays big dividends sonicly.
I rewired my whole system including electronics with VH Audio
solid Core -OCC Teflon copper wire,and only Copper connections throughout, most companies use gold over Brass which is 4x less conductive and bright compared. it made a Huge difference
in system synergy ,to complement the Xover upgrade. These are
things that cost say $3k in total but better then if I spent 3-4 x that
for cable markup alone in name brand cables is 4-5x at least.
knowing the quality of the wire and geometry is the main thing
then just taking the time to do it and save $1,000s in the process.