5 years ago, i compared NAD 315, Marantz 5004, and Marantz 8004.
I kept the NAD because it is punchy and lively with budget bookshelves (b&w 601 in my case)at low to moderate volumes, and I kept the Marantz 8004 because the midrange is superb, and because it is slightly on the warm side of neutral and powerful enough to drive speakers (rega rs-5 in my case) at more than moderate levels without compression or distortion.
The 5004 was not powerful enough and not lively at all (power supply is not a toroidal)
Now, I do question the reliability of the NAD (cracking volume controls very early with mine, and it does release "POPs" now).
The marantz built quality is second to none.
I kept the NAD because it is punchy and lively with budget bookshelves (b&w 601 in my case)at low to moderate volumes, and I kept the Marantz 8004 because the midrange is superb, and because it is slightly on the warm side of neutral and powerful enough to drive speakers (rega rs-5 in my case) at more than moderate levels without compression or distortion.
The 5004 was not powerful enough and not lively at all (power supply is not a toroidal)
Now, I do question the reliability of the NAD (cracking volume controls very early with mine, and it does release "POPs" now).
The marantz built quality is second to none.