If I plug in Miracles directly to Xonar STX, I feel it kind of fatiguing and with not much low end depth. But once the Meier comes into the equation, highs are more controlled and the low end hits hard. It sounds pretty good.
Stepdance does magic with my cell too. Otherwise my cell is pretty bland at audio quality.
Another amp I'd like to compare with my current setup is Leckerton UHA 6S MKII.