Looking for preamp which is good at BOTH single-ended AND balanced output


I am looking for a preamp which sounds good at BOTH single-ended or Balanced output. My DAC has both single-ended and Balanced output. I have vintage tube amps which only allow single-ended input. I also have SS amp which only allows balanced input. I use both amps alternatively. Sometime I even use both together for bi-amp setting.

Is there any good used preamp under $3000 recommended? I have opportunity to get BAT VK-30SE or 31SE, I know they are good for balanced output, are they equally good for single-end output?
ccheung
Why not take a look at the Benchmark Media LA4?  It's Stereophile class A, offers both balanced and single ended inputs and outputs, and is below your top budget, selling for $2,600 new direct from Benchmark.  
If you don’t need an active pre-amp, the IcON 4pro does both single ended and balanced input/output and provides outstanding sound quality. 

http://hifiknights.com/reviews/preamplifiers/icon-4pro/
I can reccomend the BAT VK-30SE, I have one in my system now.  While you will probably get better results with balanced due to the topology itself it does quite well with unbalanced inputs and outputs
+1 for the Schiit Freya +. This is an amazing preamp that I have used in both balanced and SE. The reasonable price is the icing on the cake. I haven't even tried tube rolling yet - stock tubes are getting it done for me.