The Nad pairing would be the obvious choice, but not necessarily the best.
Nad amps usually have poweful bass and well detailed. The Marantz, in my view, has broader sound across all frequencies. Both are very good. If you can't audition, then plump for the Nad pairing; if you find the character not to your liking you could always sell it and go with Marantz.
This is a tough question without knowing what 'does it for you' sound-wise - and, of course, what sort of music you prefer.