Currently the speech is a bit muffled when I'm watching movies. I'm not sure if this is to do with home cinema set up, speaker layout or the fact I'm using onboard. Any ideas?
And lastly will this card give me 5.1 surround sound through s/pdif?
i think its a onboard card issue, ALC887 is a 7.1 channel but cannot handle your huge power SC-XH170
and yes, you and your SC-XH170 will happy for asus xonar DX
please update after upgrading your sound card
Forgive me if I'm wrong but isn't the home cinema system acting as an amplifier? So power should not be an issue? I'm only theorizing