Recently got a refurbished A2070 through A4L. Debating switching to a refurb NAD T758 v3, mainly for Dirac Live as I have a challenging room and don't really have the ability to do much about positioning and treatments (it's the main living room).\n\nI hear mixed things about NAD reliability. How bad is it really? So far the Yammie has been rock solid.\nNAD is good gear. What are you look to achieve by switching from Yamaha to a NAD AVR? Room correction? Autocorrect? or are you wanting control of your room environment.? As for sound quality both units will achieve the same sound quality. You haven't mentioned in your original post what speakers you are using sub or even if you have room treatments. If your looking to get more sound quality with auto correction from either unit both will do a pretty good job. But if your looking to sell off your Yamaha A2070 to go after that NAD unit, hit me up with a inbox, I may be interested in taking it off your hands if the price is right.