Musical fidelity M6SI problem.

I am a dealer for MF.  I have never had a customer have that issue as described.  
Regarding customer service, that is defined by your dealer.  I had a customer with a warranty claim.  Focal Naim NA (the distributor) quickly provided me a service center nearby the customer.  The service center was slow, but that was more that they couldn’t replicate the issue which turned out to be wonky issue with a particular turntable.  
FN NA paid for the service and return shipping.  Was not an issue.  If you have customer service issues these days, it is solely an issue with your dealer.  

That's reassuring, considering I have purchased am waiting for delivery of a new M6SI.

Robert53 - I think you're going to love the M6si.  It's a great integrated amp - easy to listen to, drives any speaker, nice soundstage.  

How hot does yours run?  I heard they're heavily biased into Class A.

smrex13, I can't wait to hear it after reading the positive responses including yours.