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

While I realize this would change my budget, Maggies are a consideration- 3.7i.  I have a dedicated listening room for my primary system.  Thanks to the recommendations from this group.  It is 13’ x 22’.  The WAF is good to go.  
 

I have heard the 3.7i, but I do intend on listening to them.  

I am open to either new or used.  I currently own a pair of B&W 804 D3.  I like them a lot and they are paired with McIntosh and Levinson.  I live in Seattle.  We seem to have a limited variety in this price range.

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.