Ok cool.ER4/ER3 = 4K at 120fps
HE400i/LCD1 = 4K/120fps
DT770, ER2xr = 1080p60
I would get the HE400i/LCD1 first since there not much gains on the EL-8 since you'll EQ'ing on the first too anyway and the drivers are low distortion anyway. Kinda like how a ER3SE + 75ohm = ER4SR.
If I have to EQ the HE400i and/or LCD-1, then I'd rather get the EL-8 since it has the oval earcups. Does the EL-8 need EQ'ing? I only want planar headphones that DO NOT need EQ'ing and have a mostly neutral sound signature. From what I've seen, the LCD-1 and the EL-8 both have the same super low distortion level (per Audeze) of <0.1% @ 100dB. Not sure on the HE400i, but prob the same I assume.
What about the Hifiman Sundara? It has the same distortion level rating too.
If you had to rank these 4 headphones, how would that look? Actually, disregard the EL-8. A quick comparison review search has a few ppl saying that the LCD-1 was put out as basically a replacement of the EL-8. Some other ppl have said the LCD-1 isn't very "fun" (one person even said "lifeless") to listen to as well, though many others say they blow away other big name headphones like AKG, Sennheiser, etc, and one even Ken Rockwell compared them to $4000 Stax headphones?! Hmmm. Thoughts?!