I've had the A2s for several months and listen to them at least six hours a day. These things are like your kids--you know their faults, but you love them anyway and wouldn't trade them for anything. A mark of a truly good speaker is that with better equipment and source material upstream, they themselves sound better. These things pass that test with flying colors. I've mated them with the Audioengine D1 dac--a phenomenal bargain at $169--put them on the matching stands, and bought good RCA and USB cables. Next, I got the J River media center player, set it for kernel streaming, and downloaded some 96/24 files from HD Tracks. Oh. My. Gawd. In terms of sheer pleasure, this little rig rivaled my $10k system in the other room. I'm not kidding. I sat at my desk and laughed out loud at the absurdity of what I was hearing, and the more I turned it up, the better it got.
In some ways, the little system actually beat the big system, much to my dismay. To make a long story short, after some experimentation, I ended up connecting the D1 directly to my 250 watt per channel amp driving a pair of Martin Logan SL3 electrostatic speakers. Again, I laughed out loud at the absurdity of what I was hearing. This palm-size USB dac obliterated my CD player AND preamp whether was playing mp3, CD, or hi def. Needless to day, I'm rethinking my whole he-man stereo, now.
If you hate the location of the volume knob on the back, the knob on the front of the D1 takes care of that. Sorry for this rambling post, but I'm pretty high on my Audioengine gear.