I was in the same boat. I was absolutely convinced by everything I read online that Passive BiAmping was like
cracking the code!
I slowed down and paid attention to the reasons why it’s not, rather than the claims people were making about the magical results they had.
In the end, to me, it didn’t make sense that (in this instance) there was any magic involved. Not that a good pair of Speakers with a quality Amp could deliver on by themselves. Offload the bottom end to a quality Sub, and you’ve got everything you need! (Including the frequency range to listen to big @$$ pipe organs
)
For Sound Quality, just make certain your gear is set up well, especially placement of your speakers and LP in the room. This has almost as much payout as having a very good set of Speakers! But the Speaker-Room interaction can kill even the best sounding gear if you get it wrong.