A pair of NuForce HAP200 amps in monoblock mode is hard to beat. $350 each or $700 for the pair. But it needs volume control from the DAC or an intermediate preamp, so X-Sabre is not a great match in that respect. The Lake People G109 is also very good. Not fancy looking, but sounds excellent, especially with Audeze headphones. I hear very good things about the newest M-Stage balanced amps. Might be worth trying out.
8/24/15 at 12:31pm