I voted for the LCD-3, both above and with my credit card.
I auditioned all of these options except the LCD-2r1s (and also tried the HE-500 and Grado PS-1000) for several weeks, taking advantage of the CableCo library. I had no preconceptions going in, was going to pick whichever one I liked best. My bank account was hoping it would be the HE-500... but unfortunately it turned out to be the LCD-3s. They had the most depth and detail and the realistic timbre of the sound was exceptional, to the point that you think you are in the room with whoever is making the music.
I liked the LCD-2s, but the -3s were enough better in every way that I knew I would regret not spending the extra bucks, even if I had to eat a lot of spaghetti for the next several months.
The T-1s were a close third to the LCD-2s. While I prefer the Audeze house sound, I really appreciated the T-1s' overall good performance, and they are very comfortable for long-duration listening, where the Audeze's are hot and heavy (though I've been wearing them for several hours tonight, and my head hasn't fallen off or imploded, so all's good). I am intending to buy some T-1s at some point in the near future, as soon as I can justify the expense. They are a good change of pace from the LCD-3s, and I enjoyed them enough that I believe they would get a reasonable amount of head time.
I recognize the excellent comfort and sound-stage of the HD-800s. Didn't like the sizzly treble. Note that I was using either my Adcom GFP-555 pre-amp's solid-state headphone out or a Burson HA160 to drive them at various points in the trial, which was probably not the best match. On the other hand, I liked the sound of the Audezes and Beyers through the same rigs, which put the Senns off the "potential buy" list. Maybe if I fail to keep myself from buying a new amp I'll give the HD-800s another try, but since whatever amp I'm likely to buy will be aimed first at the LCD-3s (currently struggling to resist Thor's Hammer or an Australian Soloist), I doubt I'd end up with the perfect fit for the Senns anyway.