Dirac really takes the sound to another level. Really like it. Modularitiy is great for adding newer audio/video formats. I mean the older nads which did not have hd sound could benefit from the modularity but it sure is pricey. I also got this around 1.5 years back got my sound cad upgraded to the newer ones after persisting with Nad Asia Pacific and am now very happy with the same. My reasons for preferring this receiver over the others was the sound. Well though I have a separate setup for music but still occasionally use this while listening to songs on youtube. Further if you have a bigger room use this with a power amp as this is rated for 60 watts