I just bought an open box V2 for $1259.00. They are out for now.I wouldn't torture myself with HE6se. Getting something like that would limit you with other things in the long run. HE1000 v2 is an excellent HP and should be no problem to drive for MAX, at least for my preference that should be an excellent pairing.
But, they have the stealth open box for $1259.00
https://store.hifiman.com/index.php/he1000-stealth-refurbished.html
Good luck