I have a bunch of headphones that I'm eager to test and see how much better/worse they all are. Not sure I will ever truly try all of them given the need to do a calibration with each set. My hunch is the differences will be minimal for most. I think the A16's unique use-case might make some otherwise average/mid-tier cans better (e.g. the 400i, an accurate affordable planar) than more popular/better reviewed cans (e.g. the HD6XX) due to the criteria you want for VSS/simulation.
My guess on which of my cans are going to be best, in order:
1. HD800S
2. Koss ESP950 (unusually excited to try these)
3. HE-560
4. HE-400i
5. LCD2 classic
6. AKG 7XX
7. HD-598
8. Fostex TH-X00
9. VModa M100
10. HD6XX
Wildcard: My Nighthawks. No clue how these will do. My guess is the holographic feel to them will be great. Can't rank them though.
This is mostly ranked on what I remember in terms of soundstage/imaging for these cans using the 5.1 VSS with my Creative X7. Like I said the A16, my guess is, will throw some of the usual headphone rankings out of whack. The HD-598 for instance has a great stage with great imaging even if the TH-X00 is to me a better, more fun headphone for almost everything else, listening out of a normal source.