Speaker choice

I listen to music at my living room second floor which is open space linking to first floor and about 12ft x 15 ft. 
 

My source is a Naim uniti atom network streamer and my amp is a Pass Labs XA30.5. I use to run this set up with a small harbeth p3ESR. But I couldn’t feel the speaker is not enough as the space is too huge for it. Now I have sold my speakers I m looking for a floor standing pair or a bigger XD speaker. 
 

budget : within $5k used unit. I will buy a subwoofer eventually to enhance the bass  if needed. Need to save up. 

I listen to mostly pop and orchestra music. I enjoy good and sweet Treble , clear , detail and musical vocal with lots of air and tight and solid base. I like my music that gives me the feeling that I am physically at the concert hall.

Which pair of speakers I should consider ?