Haha, sorry for being a bad influence!
I'm pretty hyped about the DX90 as well, but I'm afraid you overestimate my influence. I am living perfectly fine with 64gb but when it comes to storage, more IS better. I'd never use the OTG function either, no scanning and you're definitely going to break something.
Thank you for the kind words on the K10 - I'm still madly in love with them as well, but they actually sound better than they look. Especially when driven by the balanced output of the PB2!
Okay than, another idea. Why don't you come close to FiiO X5? If DX90 won't bring higher capacity, it is 'unfortunately' a dead born baby for me. Every people has their own needs, for me, one of the most important thing is, at least 128 gb capacity, the more is always welcome.
As for balanced setups, I think I am gonna go down this route too but I am afraid it won't be iBasso's way. The balanced connectors they use is problematic I see. I wish they could make it with RSA style (Kubikconn or something like that, not really sure). That would be easy. So there is a chance I might end up getting Lightning later and forget about single end for a long time.