Electrostatic headphone amplifier recommendation


Finding a reasonably priced electrostatic headphone amp is proving harder than I thought.  It seems like everyone likes the blue Hawaii  for my stax 'phones (SR 009) but at $6k!  Yikes!  I'm hearing mixed things about Staxs own amps, that they can be a little noisy.  Looking to spend less than $2500 ( used).  

russellrcncom
For the best sound, match it with a STAX
(I researched it)
I use my Stax SR L700 ($1500) with a Stax SRM 006s driver ($1300) using NOS RCA clear top tubes, and get great results.

I used to own a Stax SR 009 headphone, but that was too overly detailed, and "bright " for my tastes.

I have heard very expensive driver amps that are not any better.
I recently got a KGSS amp for the Stax 009 which replaced a Stax 007tii.  The KGSS is definitely much better than the 007tii.  More dynamics and better bass.  There are many versions of KGSS and you should read up on it at headfi.org.  I paid $2200 for the KGSS.  
Rich