The Creek and Exposure amplifiers are very good.

The Musical Fidelity M3i is also outstanding, for $1500 (from Audio Advisor).

Also...due to the pending sale of one of my homes, I have a M3i I will sell for $900. It is two years old and like new. Another option. Send me a PM if interested.

I don't think the Anthem or Roksan have the quality of the others; I have serious reservations about them.

Consider preamp + power amp combos from Vincent,  or integrated amp from them, in the high side of that price range.  check them out in audioadvisor dot com.