I haven't, yet I've heard it from so many devices, and the sound remained largely the same (literally like 95% on all devices).
If it was something like the HE-6, I'd agree on getting much better gear. But the LCD2 is not like that.
But anyways, let's all be dreamers and belittle anyone who buys the LCD2 with lesser equipment, because to his eyes, it's a waste of money.
Only people with his kind of exorbitantly priced purchases deserve the LCD2, it seems.