In my opinion-Marantz. I auditioned both receivers (as well as the HK AVR230, see other current post) and the Marantz is, in my opinion, far superior in music reproduction, and as good if not better in home theater.
The Marantz is flatter and more natural. It has a tighter and more subtle bass and highs that are detailed but not "sharp" or "harsh".
Both are good build quality and have nice amounts of power but the Marantz would have been my choice hands down.