I am planning to setup a surround sound system with in-ceiling speakers at the back, one to the left and one to the right. I already have the pre-wiring to mount the in-ceiling speakers at the back.

I currently have this receiver (Onkyo TX-SR308) hooked up to two 260W 8ohm floor speakers which then connect to my PC with optical cord. Now the optic cable on my PC end is Onboard with the Asus ...