FWIW...
I believe that my Denon 1804 is (roughly) a comparable ancestor of the 1707. I have M60's.
I like (and use) the Zone2. The amp is reasonably capable (louder than I really need it to be, even in a big room).
BUT there is no way I would advise anybody to buy a receiver without pre-amp outputs. The upgrade path is just too painful. Oh sure, you THINK you'll never want to upgrade.
I would stretch the budget and get a 2807 or 3806 instead; not only are the outputs more flexible and the amplification more robust, but also you get the Audssey Multi EQ. Refurbs at Dakmart for about $800. Maybe Ecost.
