I had that very same integrated for a number of years, it is very good. However, I wanted to see if I could do better and added a separate preamp, bypassing the one in the NAD. This was a significant improvement and removed some of the grain in the sound. It really comes down to your ears, and budget of course. If you are happy, then it’s hifi!
BTW, these offer a nice improvement to the sound over the metal jumpers on that integrated: