Didn't MLE try Headzone for a while? Was it beyond way more than quite superior to the Mixamp?
If you're even considering the non-T50RP orthos, the T1, and the HD800, you can certainly afford a Stax setup. It'll have to be Lambda-series, not the SR-007 or SR-009, but you can afford it. (Seriously, why do the Lambdas hardly get any respect outside of the Stax Mafia?)
There must be some other reason why you won't consider them.
The thing is, I have 0 experience with STAX and can't put or place them between other headphones in my personal ranking, not even estimate. It's hard to find a place to listen to them as well.
Which set or combo are you referring out of this list? http://www.fl-electronic.de/neuklang/stax.html#preise