bagwell359
Headphoneus Supremus
I have the HE400i and the HD600. Although the 400i has deeper bass, the distorted midrange on classical voice recordings and acoustic piano takes it out of the running for me. I rarely use the 400i.
I have the HD-600, HE-500, and MD-4xx.
The HE-500 with fuzzor mod, Ether C Angled Pads, and driven thru XLR by a Ragnarok is easily superior to the other two. In really every way vs the 4XX. Under certain circumstances the HD-600 gets close, but overall given what I listen to, it's a 90% easy win for the 500 and 10% pretty close.
But before I got the 500 the 600 and 4XX did pretty good battle with each other. 600 for def, 4XX for overall beoing punchier in the bass and getting to the emotional core of the music better. 4XX isn't a ref phone, the 600 is a ref for timbre and flat frequency response but those that think it's SOTA for definition - go listen to the HFM HEX V2 or HD-800.
All 3 are great values used - for sure. Enjoy them, but I can only sometimes find myself in the music with the HE-500 and never forget the other two are transducers.