Thanks for that. I'll dig deeper into those but I saw a THD plot of the Ca-1a and under 400hz , the distortion gets completely out of hand. Not sure that's what I need but I definitely need to listen to those before choosing. It's sad as I thought it would be exactly what I need given the info people gave after trying them.Love stats. I think our tastes/needs are not that different. Please check out:
Rall CA-1a - esp w/ the filter, but I think it requires a PC, PEQ for sure
HEDD v2 - not heard but know the technology well, I want to hear it (v1 used another possible target, but of the choices I list here (along with the E2) is below the other 3 in absolute terms (to my taste)
DCA E3 - mammoth reviews including from people i respect (not just sites that sell stuff and everything they sell is the best ever...). Know the company well, very good cans, keep getting better. Have not heard it yet.
DCA E2 - has the best bass (real not technicolor outside of the HE-6 6 screw) of any open back planar, very clean, smaller image, treble over 10k a hair reticent, but PEQ fixes is. After the hysteria of the E3, used prices might get it into the $850-900 range - they have held value of the OG price very well - but that's going to end.
all those choices cheaper than estat + estat amp (used DCA Voce & med/high powered used amp is going to be > $3k)
I'd bet a decent chunk of change that at least one of these would be a real upgrade for you and might be the end game. Pretty sure when I hear the HEDD and E3 I will have also arrived at my end game
I think I'll try emailing some of those company to see who's willing to lend a set for testing. That would be my only chance to truly know I have a winner in hand before buying.
I know Focal is willing to send high end cans for testing.