Herron 1A,, Herron 2A, Modwright LS100 or Aesthetix Calypso?

I have narrowed down my pre choices to these. I would like to hear what opinions there are, maybe even from actual owners. I have owned a Shrimp and BAT VK3ix in the past. I definitely want to take a step up. The Calypso is at the top of my budget. I am not able to audition any, just buy and hope I made the correct choice. If it matters, my amp is a Rogue stereo 90 magnum. I am currently using the Eximus DP-1 DAC/Pre and a Salk Streamer tied to Aerial 8 speakers. Obviously I will have to pursue a DAC as well.