You can use the tape out of the 1070 to drive an integrated amp in a second zone (Gonk and I have an Outlaw tread somewhere describing this). The Rotel will also need an amp of some kind, either to drive the front channels and redirect the receiver amp to the second zone or to drive the second zone, so there is no loss really compared to the 1070. Now if you want a third zone, you'd need to use the same trick on the 990.....