It turns out that my DVD player can convert the DSD signal to LPCM, so I don't need the receiver to do it. On another forum (hometheaterforum), someone said that receivers are moving away from supporting DSD and depending on the DVD player to decode.
Now my problem is that being naive, I just realized that Denon and Marantz were made by the same core company, so I'm concerned that if the NAS connection was faltering with the Marantz, it will do the same thing with the Denon. So really the question becomes just how much will I need discrete crossover settings.
Thanks John, I was looking at a 609. But my last two receivers were Onkyo, and for no logical reason I just want to try another brand. Kind of like ... you meet a really great girl, but she's a blonde. And since your last two girlfriends were hot blondes you just would rather hold out for a brunette or redhead. Yeah, I'm not making any sense ...
