I have the AVM 70 - their software is fantastic - it is my 3rd Anthem - every Anthem I have owned (some of them were avr) have failed so make sure you have a good dealer to stand behind the product. I only buy them because my dealer is great. I don't believe their software will blow a speaker. There are problems with the HDMI handshake and CIC control on these units.
I recently purchased an Onkyo to replace my Anthem which was in for repair - it uses the Dirac system that ARCAM uses. I was shocked at how good the onkyo was - no glitcyness that was inherent in the Anthems. Now the Onkyo is single ended - but I think I would rather have something that just works and sacrifice a little sound quality.
My kid tried an Arcam - balanced great with Dirac - but the Amp in it blew up in 3 weeks.
When the next Anthem dies - I'm going back to Onkyo.