I've been thinking about this for a while and came to a conclusion today. There really isn't much left for me in the headphone world of dynamics and orthodynamics. I have heard just about every headphone I am interested in listening to that involves these two driver types and I own one headphone each that is very well regarded. The HD800 is a great dynamic and the HE-6 is a great orthodynamic. There are other flavors of good but haven't been excited about any release since the HD800 and HE-6 so I'm highly considering venturing into Stax. That does require a completely setup as my amps won't work. Also no I won't go into speakers.
What I'm wondering is at what point of Stax should the entry be for me. I want a progression in quality from my HD800 and HE-6. Also yes I am aware of that huge Stax thread in the Summit Fi area but that thread is over 1k pages long and hard to go through it all unless you give me like 3 months lol however I digress. There's four Stax models that I am aware of. Those are the 407, 507, 007 and of course the 009. Which Stax model would be the entry level for me? I have a guess at the very least it would be the 507 based on price but price doesn't always automatically mean quality so some guidance on that would be appreciated.
Also another thing would be amp. I am aware of the two HeadAmp Stax amps in the BHSE and the Aristaeus but both of those are made to order and require a wait time of longer than I am willing to wait and a cost of higher than I am willing to spend at least right now. Then there's those Stax SRM amps but to my knowledge they aren't sold in the US unless I find something in the FS. What would be a good amp that pairs well with the different Stax models. Lastly there is also bias which I've read about in various Stax threads such as pro bias and normal bias and not too sure what that is.
Any recommendations on where to start would be appreciated. Thanks!