What’s the most badass $2k amp I can get?

Why not get pair of Schiit’s Aegir to complete the setup? At least you know the synergy between Aegir and your existing pre / DAC would be super awesome 😎 

 
I saw you were interested in the Aegir on your other thread. 
Your speakers are fairly demanding. Rated at 8 ohms nominal, impedance does hover around 4ohms at the upper bass to mids. 80W (Aegir) would be the minimum amp to use. Aegir monoblocks should work, especially in your small room.

My Thor are 87 db, so i know you will need power, maybe not pure class A, but certainly A/B. 
Here is my pick.
LM 501A, has 4 Big bad boys The KT120's,, and right at your  budget,,but you'll have to add in $350 ship fees.
She's a beaute,,if i did not have this jadis Defy7, i'd go for the LM 501A. as 1st choice.  
Offers only 1 AU, make ita  Philips SQ E80CC, for AX's go with Shugaung of any of your fav NOS, The 6SN, you have plenty of great choices, either NOS or Shugaung. 
rated
~~~100 watts~~, hefty beast at near 80 lbs. 
I think has a pre in, so you can employ your pre, or sell it. as the pre in the LM may top yours.

Ayre !!!!

Forget the meters and find a used Parasound 21 or 21+.