I think, for the most part, there is already a general consensus among people who have heard and/or owned a lot of gear, what constitutes high-end, even if there are some variables thrown in. HD650s paired with a predator may sound good to someone, but I don't know anyone would put them in the high-end category. Balance those 650s and throw them in Voltron's EMM labs/SDS-XLR rig, and that's a completely different story. The beta22 is inexpensive by comparison to $5000 amps, but it competes with those in sq on the same level. If you've heard it as well as others, there really isn't a doubt. I don't like the sound of the Edition 9s, but that's a discussion that can be had here. If the HFI-780s show up here, I don't know of anyone who has both heard them and a lot of other headphones that would even entertain the idea they're high-end. Etc. blah blah.
I'm just hoping this forum won't get stuck in the argument of what is and what isn't high-end gear. That's a useful discussion, but may be better left in the members' lounge. I'm also hoping that trolling on that front might be zapped as soon as it appears. Most members who have high-end gear, have owned/heard a full range of gear, have gone though a lot of trial and error re building systems, and I'm hoping to learn from those discussions, and not get bogged down in battles of "but my rig should be high-end, too, since most people in my home/school/neighborhood/state/country/universe own bose and ibuds." That's an exaggeration, but think the caution is valid. I plan on deferring to the judgment of those whose knowledge and experience I respect. I'm hoping others do the same.