FWIW I ended up ordering 3 TD12X on the 9th May and they were shipped on the 25th, they landed in the UK just now apparently so should be with me in the next day or two.
I also have a faitalpro 12rs1066 to go in the initial (smaller) woofer, seems like a fairly beefy little thing
surround seems rather enormous
I chose this on the grounds it is comfortable in a pretty tiny box and aimed for a tune that in the high 30s, result was a 37Hz tune
it's going in this box (NB: the pole was just to check the fit, not actually going to deploy like this)
powered by a hypex fusion plate amp crossing to the small syns at ~150Hz