I have one and am/was very happy with it. Sorry about the equivocation but there is a reason. When I first got it, I was more than happy with the sound. I even took it over to Acoustic Image and Elliot was more than happy to let me insert it in his system to have a go at it. It replaced a top of the line Ayon CDP and at first, it lacked some body compared to the Ayon but after a few minutes (literally) all was forgotten and we enjoyed the whole CD I had brought. It more than held its own. It should have no problem besting your Marantz, IMHO.
Fast forward to the present: I've gotten into computer audio and now prefer it to the TEAC PD-H600 to the point that I haven't listened to it for almost half a year now. Once in a great while I'll put on a CD but I still prefer my iMac.
This is not to knock the TEAC as I feel it is a great CDP and something as simple as system synergy could be at play here concerning my system. I thing you'll be pleasantly surprised.
All the best,
Nonoise