So, guys, I've had my XLS 2000 for just under a week now.
Do I have anything conclusive to say about its sound? Of course not - I'm not so arrogant. But man, does my system sound good. The bass is effortless, any harsh sibilance seems to be completely gone, the speakers sound good whether at -40 or +3, and I hear layer upon layer of content in different recordings. Whether that's the amp or not, I can't say. But I honestly can't imagine a better amplifier being available in the whole world at any cost. I'd love for someone to reliably prove me wrong but as it is, I'm just happy.
I would recommend anyone with great speakers, whether you spent 2K, 5K, 20K, or 50K to give these amplifiers a shot. You might be really damn biased, but who knows, maybe this amp sounds better than the name-brand audiophile amp you're looking at. Or it sounds the same but weighs a fraction as much. Or it sounds the same but costs a fraction as much. Just clear your mind for a moment and buy one from a local store with a return policy. You can make any decisions after that yourself. You might find yourself with a few grand in your wallet and a better sounding system.
The only complaint I'd make about this amp is that the blue LEDs are pretty obnoxious. I had to hide the amp behind an external hard drive and a gamecube.