Hi, (1) I want to pick up a Rotel 1077 but can not afford the RSP 1069 processor as of now. Is it possible to use my Marantz SR7500 as a processor and connect the pre-out to the RMB 1077. (2) I plan to drive my Polk RTi A7 rated at 300 W at 8 ohms in a bi-amp mode using the two surrond backs fromn the RMB  1077 (3) Would this sound bette ...