Down to 2 speakers & I can't decide, ProAc D48R vs Spendor D9

what about naim loudspeakers? also great speakers on audiogon sell for incredible prices. you can buy way better speakers for the money. just an opinion. 

So you've heard the ProAcs and the ATCs, and I assume/hope you listened to them with your own music.  What did you think?  I personally love both these speakers, but for very different reasons.  If I'm looking for dynamics and the feeling of a live performance, I'd go ATC no doubt.  If I'm looking more for "audiophile" characteristics like a deep, 3D soundstage, speakers disappearing, etc. then it's ProAc.  To me, these major speaker strengths and inherent characteristics override the mode of amplification in this particular situation.  Only you can make that final decision, but with your preferred music my strong bias would be for ATC.  And yes, their active speakers are clearly superior to passive, which you've obvious already found.  From what I've heard from you so far, if it's me I'd sell my current amp to help finance active ATCs.  Just my $0.02 and FWIW. 

I just traded in my atcsm40s for spendor d9.   The atc need to be played very loud to hit their stride. D9 I can listen to at a lower  volume and still sound nice.  Soundstage is great

Spendor is more for serious music.

Whereas ATC is for superficial music.

What does that even mean “serious music”