Recommendations for Vintage Speakers

I’m currently looking to put together a vintage system and am wondering what a good pair of full range, floor standing speakers would be. They would be powered by a Pioneer SX-1250. I listen to a very wide range of music, a lot of live Grateful Dead, Classic Rock, Metal, But also enjoy Jazz and even a little Big Band music once in a while. Thanks for your help!
I'd look for vintage Polk in the SRS-SDA series. They were remarkable in my vintage system. Sorry I let them go.
I have a friend of mine who I call "Vintage Joe".  He has had all of the above mentioned speakers.  Depending on your price range and room size the best speakers I heard from his system was the IMF 50s and up.  Large box style floor standers.  I also agree with KEF 104/2s and 105s and Dahlquist DQ-20i's.

Yep the Quantum would have been a bad match.

I know in the receiver world 160 wpc was "monster" power.  Not so much in high end, especially for demanding speakers.  And then there's the question of the quality of the amp.

Which leads me to this: I'm going to hedge a bit on my previous Dahlquist DQ-10 recommendation for the OP.  They do need high quality, high power amps.  Maybe the oft-recommended Advents would work better with his Pioneer.  I'll never forget the "disappearing act" I enjoyed with my DQ-10s, but I don't think the SX-1250 would match up very well.  Those speakers were very revealing, and I had a really nice front end.

Ohm Walsh 2 & 4
Aerial 10t
NHT 3.3
Pinnacle ac850
Spendor BC1
Pro-ac Response 2.5
Infinity Overture 1
And yes the DQ 10's I'm a huge fan of them...their imaging is remarkable....