If I decide to get the Yamaha RX-497 and it has no optical, that means im going to have to use a 3.5mm cable or one with a Y splitter correct? If this is so, does that mean I wont be able to use the DACs inside the 497 and use whatever my computers using? If so, whats a good sound card to get for this? Im just using this for music/mp3s/Itunes and Roland electric drums.