I am also with Sparkos Aries for more than a month.
I contacted Andrew Sparks for info and decided to try it, also because I was offered to be able to postpone behind if I was not satisfied and be completely reimbursed, but after 2 days of listening, I told him clearly, my friend, this amp is not It moves from here.
I need to say that after having the AIC10 Riviera for 3 years, it was difficult to find a worthy substitute, I tried a microzotl, a passbs and an audio rogue, all good but no one that reality took me to something profoundly exciting. Here the Sparkos Aries manages to fill that emptiness, because it is a real champion, combining speed, details, resolution and silence, with full and colorful harmonics, perhaps thanks to his deadly Opamp.
My version is also equipped with a totally balanced stadium, with which a 160 watt pilot powersoft for my raal, and it is true that pilot headphones very well, but the pre section is incredibly good, transparent and clean In details, but capable of being very harmonious.
For what concerns me, at this price, there is no better, or at least, I didn't find it.