I've got an Onkyo C-7030 that is hooked up to an older Yamaha receiver and using a pair of Paradigm MiniMK3's. This is my 2channel set up used for CD and vinyl listening. I must say that I'm very pleased with the sound of the Onkyo CD player. Currently it's hooked up to the Yamaha via analog RCA cables. I'm debating switching over to the optical out. Will the sound be that much better by doing so or should I stick w/ the analog set up? What are the advantages to using the optical instead of analog output?