I may be missing something here but I fail to see the problem in using Brand X competent DSP in conjunction with Brand X Y or Z Amps to achieve the correct solution for the M2
4313B posted the filter data at the end of last year. I have the XTA software in my computer , it's a breeze to use and I reckon I could load up the corrections , filters , shelves in about 20 mins. From that point on your choice of amps is moot. Krell , why not , Bryston , why not , Mac , why not and so on. Oh , Toobs too.
Any of the good DSP's will accommodate the filtering required , That could be Xta , Xilica BSS , etc etc
For anyone wanting to play with the software get Audiocore 8.85 on this page
http://www.audiocore.co.uk/software-..._download.html
It's worth a shot just to get a handle on how these things work Audiocore is nice and easy to use.
M2 filter data , all you need is here
http://www.audioheritage.org/vbullet...l=1#post354289