What to buy?

My suggestion, simply because this is what I have, Martin Logan Motion 40's. They have a newer model out now but I think you can still find the Motion 40's, new, at a reduced price that should come under $2k.

Mine were $2K when new.

GoldenEar Triton Five or Triton Seven (Triton Three+ $2,750.00/pair). Good-great sound.  Favorable reviews.  Designed by seasoned Sandy Grossman (just retired recently).

Tekton - an acquired look but the sound punches way above their price

As previously mentioned, at $2k there are a large number of speaker choices coupled with frequent new model changes and updates (unlike say a $30k speaker where you can narrow your search to less than a handful).  I suspect that us forum members can give you great choices, but is actually too small a sample of what is actually available.

As long as you've done your homework, I believe purchasing a $2k speaker without demo isn't too risky - you'll not get a bad speaker, rather, you'll get various shades of good-great.

I'm a fan of Magnepan and Emotiva too. I owned Magnepan MG-IIIs for 20 years and decided an upgrade was needed. I found used Magnepan 20.1s for $5500 (new $12,000) and couldn't be happier. Your amp will have no problem driving any of the Magnepan line due to the power at 4 ohms. I don't know what can be found for $2000 because I haven't really looked.

Agree with the used Vandersteen 2CI.  Tough to beat at your price point.

KEF R500 on closeout or used are very detailed speakers that sound like you are in the audience with very excelent bass - no subwoofer needed, are built incredibly well (the built in mini-stands are included and are perfect for any surface). Unlike some others, they look like they belong, nice and slim and deep.