Suggestions for $2k budget

Go jump on those music culture rl-21 on usaudio. Might be the only pair you’ll ever see for sale in the us. It’s in your budget. They’ll blow your mind. 

What type of music do you listen to?  If you have a specific budget, I suggest you consider selling your amp and think of it as a “system”.  The amp and speaker need to have synergy in order to sound good.  

There are different routes:
1. Low power tube amp + high efficiency speakers + subwoofers (later) if you want more bass

e.g. Decware or Firstwatt F5 or Almarro  + Zu Omen Def I Or Spatial Audio M series.

2. High current (power) amp + planar speakers + subwoofer (later) if you want more bass

e.g. Your Adcom + Magnepan LRS or 0.7.  The LRS got rave reviews considering its price.

3. High current (power) + not so efficient, full range floor speaker, no subwoofer.

e.g. Your Adcom + Tekton Design Moab
I haven’t heard it, but just read several good reviews.  In general I haven’t heard any floor speakers I like so far.  Maybe I haven’t heard those super expensive floor speakers driving with super expensive McIntosh monoblocks.  I listen to B&W 802D and I didn’t get “wow” considering the price tag.  
4. Monitors + subwoofer if you have a small area

e.g. Your Adcom + Heresys III or IV.  I haven’t heard both, but reviews say IV has better bass.  Heresys is also pretty efficient, you can upgrade or move to a lower power amp later.

Route #1 may exceed your budget because you need a new amp.

So how new of a pair of Vandersteen II’s can you get for $2k these days?

I recently saw new Martin Logan 60XTi's in that price range.  I really liked them in a store demo, but I think a new model is coming.
But then I got some used KEF R700's for a bit less.  I really like the sound and imaging of these.  I believe the ML's played lower better.Both of the above will sound good without a sub. Stand mounts will want a sub, which needs crossover management, which is newer gear...
Lots of good choices out there!