inna,
The reasons you listed are pretty good reasons in & of themselves. I get great 3d imaging & a wonderfully textured presentation (as well as pin point imaging, even at the edges) with a modest audio alchemy PPA-1 with PS-5 power supply. Prior to this I was using a Sonic Frontier signature, for years. Much more detail (without being bright or harsh) with the AA. Haven't looked back.
The reasons you listed are pretty good reasons in & of themselves. I get great 3d imaging & a wonderfully textured presentation (as well as pin point imaging, even at the edges) with a modest audio alchemy PPA-1 with PS-5 power supply. Prior to this I was using a Sonic Frontier signature, for years. Much more detail (without being bright or harsh) with the AA. Haven't looked back.