Downsizing from tower to bookshelf

My preference is neutral to slightly warm sound with heavy emphasis on holographic soundstage. Price point is maxed at $3,500.

You listed the Revel M126be and I recently replaced a pair of B&W 805 (Matrix) with the Revels.  With my equipment (Sa10 and Cary tube preamp and amp) I would NOT call the presentation warm.  Perhaps neutral.  As far as holographic?  I get a decent sound stage in my room (which is smaller than yours) and detail stands out, which may not be your thing.

I got mine from MD (they were listing them as "B stock" and selling them for 3k and I think some change) but I see that Uncle Kevin also sells them, and for a while he had them listed  for 3k (and not "B stock").  I don't know his policy, but it is probably similar to MD's--60 days to try them for yourself and make up your mind.

I second the KEF R3, Meta version. Really nice speaker and well under your limit.

The Proac Tablette and Studio Electric m4 are interesting in that both are sealed boxes similar to Harbeth. I can’t seem to find a dealer for either so I may have to contact them direct for return policy.

immatthewj - thank you for your insight on the Revel’s, it’s very helpful.

I’ve heard the Kef r3 metas and wasn’t a big fan. They sounded thin and potentially fatiguing to my ears.

I want to recommend a speaker I haven’t heard myself, but I use the company’s products, and like them. Plus they get great reviews. The speaker is the PS Audio Aspen FR 5. Apparently they are warm, rich and have surprisingly powerful bass. 
 

The best part is they give you 30 days in your own space to try them out and decide.

I heard the bigger studio electrics at a local enthusiasts house when I was buying some speaker cables off him. They seemed to be very musical and do everything well. The owner and maker of Studio Electric lives 30 minutes from me. I’ve been meaning to take a trip and check out the lineup.