I have heard both and I disagree that the Accustic Arts combo is "much better" than the Audio Aero. Both are very good, and the real choice and expressed preferences may boil down to personal tastes.
Many players like Accustic Arts have a reputation for being ultra-detailed and are a little tilted-up in the higher frequencies, but that can become fatiguing.
The Audio Aero offers great performance across the frequency range and while maybe not as ultra-detailed as the Accustic Arts, with their patented STARS system and tubed analogue output Audio Aero offers a more natural, musical presentation and are never fatiguing to listen-to.
Many players like Accustic Arts have a reputation for being ultra-detailed and are a little tilted-up in the higher frequencies, but that can become fatiguing.
The Audio Aero offers great performance across the frequency range and while maybe not as ultra-detailed as the Accustic Arts, with their patented STARS system and tubed analogue output Audio Aero offers a more natural, musical presentation and are never fatiguing to listen-to.