I am genuinely over the moon with the Ananda Nano, yes they did require DIY modding with the headband, and throw the stock earpads in the bin in favour of memory foam velours that are superior and naturally tune out the brightness peak which is typical for HIFiMAN planars,
As it stands now, if I ever got a headphone upgrade then it can only be go big or go home,
which means Susvara. I don't know if anything else would be worth the cost over what the relatively low cost of the Nano is. At least with the Susvara it's the halo headphone with no real upgrade path, if you're going to go full hog, that is basically it lol. I also love the design of it with the golden yellow inner driver being visible through the grille.
Can't quite stomach buying a headphone that costs more than most used cars though..... Maybe if I sell some of my work shares one day in the future and use those profits to upgrade or something