I neglected to mention two of my favorite topics:
1.) The room (next to speakers the most significant component in your system). IMO nearly all systems are 'over geared' for the given room. Bigger is better, but shape is more important. Bass travels in waves, mids/highs in rays, so room shape determines bass behavior. And because mids/highs are best generated away from walls in front of you and bass is best created almost anywhere else, the best solution is monitors with 3 or 4 subs carefully placed around the room. Use of sub(s) also allow for tuning via absorption/diffusion treatments (the 2nd stage solution after room shape/size) and EQ/DSP (the 3rd and last stage solution).
DSP is available via software in the form of REW (Room Eq Wizard, sophisticated freeware) or Dirac Live (easier to use), both require use of a calibrated USB microphone (but only works with digital sources). DSPeaker 8033S is a simpler hardware solution that works for all sources (bass frequencies only). Note with the use of Controlled Directivity (CD) speakers DSP is not required for mids/highs. CD is gaining popularity (especially for studio monitors): Amphion, JBL 305/705/708, Kii3, and Dutch & Dutch 8C.
2.) Active speakers. Actives use a low voltage crossover (that can include DAC, DSP, etc.) to feed one channel of amplification per driver. Heard an A/B of passive versus active of the same speaker ($800/pair Paradigm Studio 20 v.2 versus $1600/pair Paradigm Active 20) 18 years ago. No comparison, the Actives were way more dynamic (lively), offered flat frequency response (a revelation in itself), and unbelievably deep/tight bass with superior imaging/coherence. No wonder way studio professionals almost exclusively use active speakers. With the direct amp to driver connection efficiency goes up, each can be optimized to the other, and a direct/simple feedback (drivers are reactive) is afforded.
Got my start with actives through a back door - single driver designs, which is a purist approach that's popular with SET amp owners that utilizes the one channel of amplification per driver concept. Still have a commissioned pair of single driver speakers after 15 years, but since have also owned a couple pair of active monitors, Dynaudio BM5 Mk3 and now JBL 708P.