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

Used Hegel H2 or H20.

Last year I purchased a pair of Cary CAD 500MB monoblocks for just a touch over your limit -  500 wpc into 8 ohms and 1000 wpc into 4 ohms.  Very nice sound too....read the 10Audio review.  

+1 for the Parasound A21 or A21+

A bit above your budget, the Musical Fidelity M6s PRX at $2699 is an absurdly good value for a new amp.  MF is a great value and I find the sound profile to be a bit more musical and engaging than Parasound.  230w is a massive amount of power.  It will drive your speakers easily.  Full disclosure, I am an MF dealer.  PM me if you want to discuss that amp.  

Used, see if you can find a Rogue Hydra or Medusa.  They should be in that price range and are brilliant.  I have a Hydra and have rolled in Cifte NOS tubes and it is spectacular for the money.  The Hydra is 100w at 8 ohms and will double output down to 2 ohms.  The Medusa is 200w and will double output flown to 2 ohms. 

I am am not sure if Kevin still has them but Upscale Audio used to have a used unit in stock from the Rogue.  

Vincent also has a really nice amp in this price range.  Can’t remember the model off hand.  

How about an Inner Sound electrostatic f300 Poweramp? If you go to the Sanders sound systems website you can read the review from absolute sound. That would be within your budget and a killer amp. It would drive any speaker with loads of Headroom.