Thanks for the review.
However I have to totally disagree that AKG K70x sound similar with VRM Box turned on with all modelled speakers. I've been using VRM Box for half year now with K702 in studio and I can confidently tell you that all of the modelled speakers sound very, very differently on K702. If you can't hear strong difference on K70X between car-speaker powered mid-fi Auratone and bass heavy Quested (British Studio) or even bass heavier KRK Rokit (which, for your curiosity, is widely criticized in pro audio circles for their mud - yes, they have too much bass in low end, that's fact, some hate them, some love them), then there must be something wrong, sorry. And for too much high end - yes, listening with K70X in overall isn't fun (even with VRM Box used only as DAC with processing turned off), unless the recording isn't bright/flawed itself.
No offense, but I just don't get it how you can write such thing. I've used VRM Box with K702s to successfully help me balance low end in some mixes and it definitely worked/translated to the outside world. It just doesn't make sense what you write - if that would be true, VRM Box with K702 would have never worked and would be useless - I wouldn't have known then how crappy some mixes were!