I will second the suggestion of dual subwoofers. I did this and it was a great improvement and really opened up and extended the lower frequencies. I don't like SVS subwoofers (long story) but REL and Rythmik are solid choices for audio. It can be tricky adjusting subs to your room, but when it's done well it's hard to listen without them.
Does an upgrade make sense?
I may be coming down with the upgrade bug, and I’m open to suggestions. I’m quite happy with what I have—excellent imaging, musicality, dynamics. Maybe I could use a little more depth (left right is fine and speakers truly disappear), and maybe a touch more dynamics.
Almost everything I listen to is Qobuz streaming or hi res and flac files from a NAS (hard drive). My system:
Cambridge 851 Streamer/DAC
Bel Canto Pre5
Bel Canto Ref 500 monoblocks
Dali Mentor 6 floorstanders
Everything sits on maple plinths, Gaia iiis, or pucks.
Cabling is mid range Morrows. I previously had Kimber KS1116s but sold them as the Morrows sounded just as good, on the current set up.
What do I need to get more of everything? Speakers? DAC, Streamer? Amp?