I am replacing an old Carver HR-895 and am looking at 4 different receivers. They are the OnkyoTX-SR702, Denon avr 2805, and the Harman Kardon AVR435 or AVR635. I have boston acoustic speakers (VR30 front, VR12 Center, Klipsch powered sub, JBL rears. I will be adding sides but I don't know...