The marantz amp is on my list (with Sony 2400ES, Onkyo 806/706, Denon 1909/2309) as an ungrade to my Onkyo 606.
Love the 606 with movies, although the bass makes my wife jump alot, but not overly impressed with cd playback from my Marantz CD63 KI Signature.
Therefore looking to improve on that side, even if I lose a bit of the Onkyo 'bold' way of reproducing movie sound tracks...