For $700 bucks you could try a Schiit Freya or Saga for $349. Schiit does allow returns albeit with a restocking fee. The Freya provides pure passive, JFET unity gain, or tube (13 db gain) modes and is a balanced design though it will also accept SE inputs and has both SE and balanced output. Very flexible. Very quiet...even in tube mode with volume all the way up and nothing playing - dead silent with ear at the speaker. Just be sure to get some 6SN7s that have been tested for noise; not all 6SN7s are created equal. Good luck in your decision.
http://www.schiit.com/products/freya
http://www.schiit.com/products/freya