Standmount speaker suggestion

The best I have heard in your price range are:

1. Vivid S12.  Clear, natural, but not fatiguing.  Fast.  Meat on bones imaging and excellent depth.  
2. Sonus Farber Olympics Nova 1:  Relaxed but detailed.  Sweet but natural timbre.  Natural staging.  More forgiving of poor masters while still being neutral and detailed.  Notice how many times I used the descriptive “neutral”. 
3. Vimberg Ames:  Fast and clear like the Vivid.  Probably flatter treble response than Vivid and Sonus, but that will lit you know when you play a poorly mastered recording more than the first two.  Hard to find and over budget.  

My ears like the Vivid.  Yours may differ.  Any of the three near world class bookshelf/stand mounts sound quality at or near your budget.  They all have a different palette.  Add them to your audition list.  

Many are recommending Pulsars. What kind of sound do they produce? Or better asked, what would the Pass + Pulsar produce?

They are neutral and very natural sounding where nothing in particular sticks out and everything is very refined and balanced. They provide more bass than you’d think given their size with an expressive midrange, and their imaging, 3D soundstage, and ability to disappear as a sound source are among the best. As they’re very transparent and pretty much a blank canvass, sonically I’d expect them to pass through the natural warmth and musicality you probably value with your amp without adding anything of its own while allowing all your amp’s other formidable capabilities to shine to their fullest. There’s a reason the Pulsars are so highly regarded. Incidentally, although the Graphene version does seem to offer some marginal improvements they’re nowhere near as significant as with the Perspectives (and some even seem to prefer the original Pulsars), so if I’m you I’d happily buy the original version knowing you’re not missing much if anything and save $$$ — you should be able to find a nice pair in the $3500 - $4000 range.  Hope this helps.

I tried the same B&Ws with the matching stands.  Beautiful and well made but too bright for me too.  After trying several different brands I went with Revel M126Be with beryllium tweeters.  Smooth top end.  Not harsh at all.  Good mid bass and kick drums have a great snap.  Best standmounts I’ve heard.  Retail for $4400 a pair but often on sale or you can buy used.  I have a pair in gloss black and a pair in walnut.  Highly recommend. 

Fritz.  I have Rev 7s that I love.  The Carrera is outstanding as well.  I would say they are neutral to warm but have very good detail.

What's the difference between the Carerra and the Rev 7?