Ok, so I've got a lovely mid-range hi-fi separates set, lots of audiophile CDs and LPs, but I'm very intrigued about this hi-res malarkey. Basically where do I start? If I download some hi-res files from HDTracks, what do I need to get to play them over my separates (if indeed that can be done) without bothering with discs? A DAC paired with a laptop? Could I do it from my phone? In the words of the great Joni Mitchell, help me.