My Milabs are NOT factory matched: however when I sent mine back to Sweden for repair via FDW-W that took a long time (3 months) I was sent a loaner "Factory Matched" pair from FDW-Worldwide - the main US milab distributor associated with Full Compass.
to restate: the B&K test plots that came with my pair, were within the same tolerances of the B&K test plots of the "Factory Matched pair"
My feeling is that Milab has quite good quality control on their capsules.
I know it is always hit or miss when you don't get a factory matched pair. I do really like the 8040's when I used them- I do feel that over all I like my milabs as they seem more neutral to my ears.
however If I could get a pair of the 8040's for less than $1300 that would be sweet- may be someday and then the "active"(remote) cables for them....at $150 a pop...
http://www.fullcompass.com/product/351464.htmla unique and so cool system.
if you got the cash - Do It!
--Ian