May I ask what are those priorities of yours that align with the 009's faults? I'm guessing one of them is comfort?
Comfort? Eh.. not really, but I suppose that is one factor in which the HD800 has a small advantage. My problem is with the soundstage, primarily. Some people, like Purrin, concede soundstage to the land of speakers, and it doesn't count for much in their evaluation of headphones. I'm on the other side, where I think headphones can at least compete with, or even surpass (with CIEMs) speakers in perceived soundstage. Headphones like SR-009s (and virtually all other stat/planar magnetic, and most dynamics) give me the classic headphone hall effect where sound comes from left and right, perhaps slightly in front (around 10 o'clock and 2 o'clock), but many lack a seamless transition from 10 to 2, some not even having a focused center (for vocals, mostly).
For full size headphones the only one that is anywhere near acceptable is the HD800 in this regard. It has a perfectly focused center and is decently seamless from 10 to 2, though not perfect. This is mostly due to the angled drivers, I would guess. I should think any properly set up speaker rig would out-do HD800s in soundstage, but not significantly. HD800s don't require precision placement in the room, or room treatments, and while expensive in the realm of headphones, are relatively cheap compared to a speaker rig capable of what I'm talking about. I've heard some speaker rigs with very natural soundstage. It is a nice experience, but it can be surpassed, especially with certain genres. Electronic music with CIEMs at the top of the soundstage food chain is truly magical. Speakers can't do this holographic imaging with this music. I will say speakers probably have the edge when it comes to music recorded acoustically, rather than virtually (electronic music), though CIEMs are no slouch in that regard either.
So getting back to the SR-009, this hall effect (like I'm literally standing in a hallway with the soundwaves almost exclusively bouncing from the nearby wall to my ears, very little making it direct from source to ears), ruins my experience with a phenomenal piece of engineering. In addition to soundstage, I find it is too polite, lacking excitement, and the bass is slightly lacking in foundation. A softer, smoother bass, that is well layered and detailed, but not ultimately convincing. It is certainly one of the best headphones out there, but as I said, it's main flaw is my top priority. IMO, the Abyss is it's evil twin. It gets the bass foundation and aggression completely right, but misses the boat on detail and treble extension/quantity. Both, however fail the soundstage criteria.