No suggestions but this fellow used a Musical Fidelity A5 and seemed to like the pairing. You'll need to translate the page.
http://www.htforum.nl/yabbse/index.php?topic=100788.0
http://www.htforum.nl/yabbse/index.php?topic=100788.0
Amp pairing for Nad m51 and focal 816w speakers
Hi, I just purchased a nad m51 second hand, and recently purchased focal 816w speakers. Any suggestions on amp to use? Wires are acoustic zen matrix reference 2 interconnects and basic speaker wire for now but I have option to get acoustic zen holograms or satori and acoustic zen tsunami power cables at great deal for the nad and whatever amp I get. Please assist with amp pairing suggestion. Thanks