I think they are worth it for the following reasons:Comfort and fit. They feel light. Suspension headband is super comfy. Ear pads are to die for. I actually feel these are more comfy than the PM-1. HE-500 is horrible in terms of ergonomics compared to these.Bass clarity. HE-500 tends to have this one-note muddy bass thing going on unless you run it out of certain power amps.Less bright than HE-500. Depending upon amp, I've had to EQ 9kHz down a few db. With HE-560, not necessary.Not as smooth in FR compared to HE-500 / Jerg pads, but really, can't tell easily because the 2k dip is oftentimes desirable and at worst benign.Especially resolving for an ortho. Plankton galore. I'll give it a good run against Abyss. I've already compared before in less formal settings so I know Abyss wins. What would be interesting is by how much?If people are paying well over $1.2k for AKG812, PM-1, LCD-2, this in comparison is a bargain. I myself am seriously contemplating these because the Abyss are quite heavy.