Lenehan ML2 Reference:
http://www.lenehanaudio.com.au/index.php/products/ml2-speakers/ml2-specifications/ml2-reference-specifications.html
I know a guy out my way that was the technical representative or some such thing for Wilson and thinks Lenehan speakers are better. They are lined with steel so are the deadest things you can imagine with dynamics that whack you in the face.
Despite being a standmount they are flat within 1.5db to 35 hz but have useful output to 25hz and the bass is very clean. In comparison to my speakers that are flat to 25hz I couldn't detect any appreciable difference in bass so you are not missing out on much compared to bigger speakers.
They handle ginormous amounts of power no problem.
An upgraded version has recently been released called the Limited Edition with really wild stuff like Cast Capacitors and copper lining instead of steel:
http://www.stereo.net.au/forums/index.php?/topic/46808-lenehan-ml-ii-reference-limited-edition/
They are however a bit more than $12K but you will be able to get options like Cast Capacators etc to take you most of the way to that speaker for $12K. They are simply the finest speaker I have ever heard and ordered a pair myself.
Disclosure:
I live close to the manufacturer and visit there often to check out their gear. I also own an inordinate amount of their stuff. I think I am unbiased but I think full disclosure is important.
Thanks
Bill