The OP said price is not a factor so there is no need to consider the NAD at all. The NAD amps are not more robust that the Denon and Yamaha flag ship models people are talking about here, never mind "way more". As for the ACD rating, it is kind of a silly game that people like to play. Call it conservative all you want at the end of the day it is the power that can be put to good use that counts. NAD and HK tend to stick with ACD thing and in doing so that may end up short changing the amps and caps in favor of larger power supply transformers (just examples, among other things). Given a choice between 120X7 ACD, one should take say a Denon/Yamaha (e.g. the 3808) that may be rated 160X2, 120X5, 100X7 any day. Now, if you listen to 7 channel stereo all the time then I have nothing to say but I would think that most people don't do their critical listening of their favourite music in 7 or even 5 channel steoreo mode. NAD does make good amps that are robust, but no more so than Denon and Yamaha products that are within the same price group. IMHO this claim about them being "way more robust than.........." are the real nonsense/myths/hearsays that are not based on facts and science.