Advice from Audiogon family - best speaker $3k-$4k

You should tell us what music you're listening.

I don’t want a bright speaker.  I like warm, but not muddy.  I need bass and detail.  I don’t see adding a sub with this system. 
I am not opposed moving the 804s and getting a different speaker for the main listening room. I have always wanted a of Maggies. 

I don’t think there are any "best" speakers out there. Some may suit your room and taste better than others.

Other brands you can try is Dynaudio with Emit 50 or 30, Fyne with F502 or F501SP. Canton also has good speakers. Or any used speakers that used to cost $6k to $8k.

He's going to be pushing the $3-4k budget with any Sonus Faber floor-stander even used.

And a lot of the other high quality floor-standers mentioned above.

Of course I recommend the speaker I have enjoyed for over a decade... Ohm Walsh 2000.  $3800 the pair, IIRC.  Does most things really well, and a few exceptionally well.