I directly compared the LCD-2 to the new HD650. I find the LCD-2 darker than HD650, which in fact I find it neither treble recessed nor laid back. I prefered the LCD-2 for its grain free, smooth and full bodied midrange and the non fatiguing sound. However I am not prepared to pay LCD-2's price for a headphone, and while it is good, personally I think it a bit much for what it offers.
I have not heard the HE-500. From what I read here, it seemed that it sounds a lot like LCD-2, but have a tad more treble and less fleshed out overall. However, does it have the LCD-2's smooth grain free ortho sound (elsewhere I read that HiFiMAN's ortho driver are not as grain free and more like dynamic in this department). If so, I'd rather get the HD650 at about half the price. Also how do they compare in the detail department? Or other aspects?
Btw my main amp is Beta 22, which IMO sounds, very detailed, impactful at the bottom, and a tiny bit warm. My main source is Rega DAC which to me sounds fun, warm and full bodied. I am also interested in the scalability of HE-500, HD650 and even the LCD-2
Thanks.