My answer is, "Hell no!"
One time I ordered the 4311 from Amazon and compared it to my AVP-A1HDCI. Not one lick of difference in Pure Direct 2.0 (didn't try PD 2.1 since I didn't know it was possible back then). Not one lick of difference. Since there's no way a Marantz pre-pro sounds better than the AVP-A1HDCI, I conclude that the 4311 is unequivocally the same sound quality as the Marantz pre-pro.
Okay, the Marantz is great.... If you are willing to pay the price or if you must have "separates". If you are not willing to pay the price for the same SQ (IMO), then get the 4311 or 4520.