I tried it, and by-golly, the Yammie stood-up-and-met-the-challenge-head-on! ! ! I did outstanding. If I hadn't began with the Parasound, I don't think I'd have missed anything in performance. Compared to the Parasound (And Gene Delasalla (sp?) with audioholics.com already noted it in his review of the RX-Z1), the RX-Z1 didn't have as much . . . punch. Kind of like Michael Jordan and Kolby Bryant. I don't think anything would be missed if kids today only knew of Kolby - but . . . compared to Mike . . . not as much . . . oomph, i.e. "punch." More technically speaking, with the parasound, the presence, sound stage, and basss seem more pronounced, more defined. Drastically so? Not at all. In fact, I don't know if there is a quality of difference - it's more like a quantity difference.
I've not hooked the parasound up again - not yet. I can hear its call getting louder and louder though. :)
Enjoy the sound!