To be honest I am surprised by what you say as the RA-11, unless I am very much mistaken, will have a more forward and brighter sound than the Marantz....or at least that is what the consensus view seems to be in most of the post I read about the two makes when they come up as a comparison.
I personally prefer the Rotel 'sound' to the Marantz 'sound' and always have. Have you auditioned the RA-11 as compared to the PM6004? If not then you should. Also, take a listen to the RA-10 (no DAC & no remote, mind) which narrowly beat the PM6004 in a WHF group test in January.
True the onboard DAC is a nice feature, and one that was high on my list when I changed amps recently but is it enough of a deal clincher when you compare the difference in sound of the two amps and when there are a lot of good add-on DACs available?